15-letter words with I in the middle
Delve into the fascinating world of words where the letter I is nestled in the middle. This section highlights the unique placement of I in various words, illustrating how it contributes to their sound and meaning. From everyday language to more unusual terms, discover how I in the middle shapes the essence of these words.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| congratulations | 18 | an expression of approval and commendation | - |
| electromagnetic | 22 | pertaining to or exhibiting magnetism produced by electric charge in motion | electromagnetic energy |
| straightforward | 26 | without concealment or deception; honest | straightforward in all his business affairs |
| psychologically | 31 | with regard to psychology | war that caught them in its toils either psychologically or physically |
| confidentiality | 24 | discretion in keeping secret information | - |
| extraordinarily | 26 | extremely | it will be an extraordinarily painful step to negotiate |
| revolutionaries | 18 | - | - |
| cinematographer | 25 | a photographer who operates a movie camera | - |
| professionalism | 22 | the expertness characteristic of a professional person | - |
| experimentation | 26 | the testing of an idea | not all experimentation is done in laboratories |
| unconditionally | 21 | in an unqualified manner | - |
| extracurricular | 26 | characterized by adultery | the extracurricular activities of a philandering husband |
| psychotherapist | 30 | a therapist who deals with mental and emotional disorders | - |
| unconsciousness | 19 | a state lacking normal awareness of the self or environment | - |
| dissatisfaction | 21 | the feeling of being displeased and discontent | he was never slow to express his dissatisfaction with the service he received |
| methamphetamine | 29 | an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant | - |
| technologically | 26 | by means of technology | technologically impossible |
| notwithstanding | 23 | despite anything to the contrary (usually preceding a concession) | - |
| unintentionally | 18 | without intention; in an unintentional manner | she hit him unintentionally |
| synchronization | 32 | coordinating by causing to indicate the same time | the synchronization of their watches was an important preliminary |
| environmentally | 23 | for the environment | the new recycling policy is environmentally safe |
| underprivileged | 23 | lacking the rights and advantages of other members of society | - |
| ophthalmologist | 26 | a medical doctor specializing in the diagnosis and treatment of diseases of the eye | - |
| decontamination | 20 | the removal of contaminants | - |
| confrontational | 20 | of or relating to confrontation | - |
| personification | 22 | representing an abstract quality or idea as a person or creature | - |
| entrepreneurial | 17 | willing to take risks in order to make a profit | - |
| unsophisticated | 23 | not wise in the ways of the world | either too unsophisticated or too honest to promise more than he could deliver |
| hospitalization | 29 | placing in medical care in a hospital | - |
| disenfranchised | 25 | deprived of the rights of citizenship especially the right to vote | - |
| photojournalist | 27 | a journalist who presents a story primarily through the use of photographs | - |
| unsubstantiated | 18 | unsupported by other evidence | - |
| physiologically | 29 | of or relating to physiological processes; with respect to physiology | physiologically ready |
| rationalization | 24 | systematic organization; the act of organizing something according to a system or a rationale | - |
| disillusionment | 18 | freeing from false belief or illusions | - |
| disrespectfully | 26 | in a disrespectful manner | he treats his parents rather disrespectfully |
| philosophically | 30 | in a philosophic manner | she took it philosophically |
| transplantation | 17 | an operation moving an organ from one organism (the donor) to another (the recipient) | the long-term results of cardiac transplantation are now excellent |
| physiotherapist | 28 | therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder | - |
| nationalization | 24 | the action of forming or becoming a nation | - |
| differentiation | 22 | a discrimination between things as different and distinct on the basis of their characteristics or attributes | - |
| anthropological | 23 | of or concerned with the science of anthropology | anthropological studies |
| unsportsmanlike | 23 | violating accepted standards or rules | fined for unsportsmanlike behavior |
| whatchamacallit | 30 | something unspecified whose name is either forgotten or not known | - |
| procrastinating | 20 | - | - |
| heterosexuality | 28 | a sexual attraction to (or sexual relations with) persons of the opposite sex | - |
| misapprehension | 24 | an understanding of something that is not correct | - |
| excommunication | 30 | the state of being excommunicated | - |
| procrastination | 19 | the act of procrastinating; putting off or delaying or defering an action to a later time | - |
| parthenogenesis | 21 | process in which an unfertilized egg develops into a new individual; common among insects and some other arthropods | - |
| chronologically | 26 | with respect to chronology | he is chronologically older |
| conscientiously | 22 | with extreme conscientiousness | - |
| democratization | 29 | the action of making something democratic | - |
| totalitarianism | 17 | the principle of complete and unrestricted power in government | - |
| sadomasochistic | 25 | of or relating to sadomasochism | sadomasochistic sexual practices |
| competitiveness | 24 | an aggressive willingness to compete | - |
| discombobulated | 25 | having self-possession upset; thrown into confusion | the hecklers pelted the discombobulated speaker with anything that came to hand |
| uncommunicative | 26 | not inclined to talk or give information or express opinions | - |
| crystallization | 29 | a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces | - |
| pharmacological | 27 | of or relating to pharmacology | - |
| destructiveness | 21 | the quality of causing destruction | - |
| uncontroversial | 20 | not likely to arouse controversy | - |
| standardization | 26 | the imposition of standards or regulations | a committee was appointed to recommend terminological standardization |
| cinematographic | 27 | - | - |
| meaninglessness | 18 | a message that seems to convey no meaning | - |
| oversimplifying | 29 | - | - |
| differentiating | 23 | - | - |
| disadvantageous | 21 | involving or creating circumstances detrimental to success or effectiveness | a disadvantageous outcome |
| diversification | 24 | the act of introducing variety (especially in investments or in the variety of goods and services offered) | my broker recommended a greater diversification of my investments |
| surreptitiously | 20 | in a surreptitious manner | he was watching her surreptitiously as she waited in the hotel lobby |
| photojournalism | 29 | journalism that presents a story primarily through the use of pictures | - |
| destabilization | 27 | the action of destabilizing; making something less stable (especially of a government or country or economy) | - |
| anthropomorphic | 29 | suggesting human characteristics for animals or inanimate things | - |
| undistinguished | 21 | not special in any way; lacking distinction | - |
| revolutionizing | 28 | - | - |
| superimposition | 21 | - | - |
| proportionately | 22 | to a proportionate degree | your salary will rise proportionately to your workload |
| gastroenteritis | 16 | inflammation of the stomach and intestines; can be caused by Salmonella enteritidis | - |
| microscopically | 28 | by using a microscope; so as to be visible only with a microscope; as seen with a microscope | the blood was examined microscopically |
| maneuverability | 25 | the quality of being maneuverable | - |
| materialization | 26 | an appearance in bodily form (as of a disembodied spirit) | - |
| neoconservative | 23 | a conservative who subscribes to neoconservatism | - |
| distinguishable | 22 | (often followed by `from') not alike; different in nature or quality | - |
| aerodynamically | 26 | - | - |
| synchronisation | 23 | coordinating by causing to indicate the same time | - |
| therapeutically | 25 | for therapeutic purposes | - |
| pseudoephedrine | 24 | poisonous crystalline alkaloid occurring with ephedrine and isomorphic with it | - |
| cardiopulmonary | 25 | of or pertaining to or affecting both the heart and the lungs and their functions | cardiopulmonary resuscitation |
| conservationist | 20 | someone who works to protect the environment from destruction or pollution | - |
| hospitalisation | 20 | placing in medical care in a hospital | - |
| expressionistic | 26 | of or relating to expressionism | - |
| objectification | 31 | a concrete representation of an abstract idea or principle | - |
| palaeontologist | 18 | a specialist in paleontology | - |
| disappointingly | 24 | in a disappointing manner | the discoverer of argon, Sir William Ramsay, looked disappointingly ordinary |
| trinitrotoluene | 15 | explosive consisting of a yellow crystalline compound that is a flammable toxic derivative of toluene | - |
| trustworthiness | 21 | the trait of deserving trust and confidence | - |
| vasoconstrictor | 22 | any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure | - |
| succinylcholine | 27 | a muscle relaxant for striated muscle that is used as an adjunct to anesthesia during certain surgical procedures | - |
| compassionately | 24 | in a compassionate manner | - |
| cytomegalovirus | 26 | any of a group of herpes viruses that enlarge epithelial cells and can cause birth defects; can affect humans with impaired immunological systems | - |
| controversially | 23 | involving controversy | - |
| neurophysiology | 27 | the branch of neuroscience that studies the physiology of the nervous system | - |
| discontinuation | 18 | the act of discontinuing or breaking off; an interruption (temporary or permanent) | - |
| enfranchisement | 25 | a statutory right or privilege granted to a person or group by a government (especially the rights of citizenship and the right to vote) | - |
| disorganization | 26 | a condition in which an orderly system has been disrupted | - |
| acquisitiveness | 29 | strong desire to acquire and possess | - |
| bacteriological | 22 | of or relating to bacteriology | - |
| transfiguration | 19 | (New Testament) the sudden emanation of radiance from the person of Jesus | - |
| unceremoniously | 22 | in an unceremonious manner | he was dismissed unceremoniously |
| ritualistically | 20 | - | - |
| retrospectively | 25 | in a manner contemplative of past events | retrospectively, he seems like a great artist |
| sympathetically | 30 | in a sympathetic manner | she listened to him sympathetically |
| reconsideration | 18 | thinking again about a choice previously made | - |
| distributorship | 23 | - | - |
| catheterization | 29 | the operation of introducing a catheter into the body | - |
| correspondingly | 24 | - | - |
| heartbreakingly | 28 | - | - |
| humanitarianism | 22 | the doctrine that people's duty is to promote human welfare | - |
| misappropriated | 24 | taken for your own use in violation of a trust | - |
| marginalization | 27 | the social process of becoming or being made marginal (especially as a group within the larger society) | the marginalization of the underclass |
| nearsightedness | 20 | (ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred | - |
| neuropsychiatry | 28 | the branch of medicine dealing with mental disorders attributable to diseases of the nervous system | - |
| parliamentarian | 19 | an elected member of the British Parliament: a member of the House of Commons | - |
| demographically | 29 | - | - |
| epidemiological | 23 | of or relating to epidemiology | epidemiological studies |
| endocrinologist | 19 | physician who specializes in the diagnosis and treatment of conditions affecting the endocrine system | - |
| euphemistically | 27 | in a euphemistic manner | his violent death was euphemistically referred to as a passing away |
| dispassionately | 21 | in an impartially dispassionate manner | although he was looking at the other girl, he did so dispassionately |
| acclimatization | 30 | adaptation to a new climate (a new temperature or altitude or environment) | - |
| architecturally | 25 | with regard to architecture | this building is ugly, but architecturally interesting |
| troubleshooting | 21 | - | - |
| unselfconscious | 22 | not self-conscious | she grew up with him in unselfconscious friendship |
| voyeuristically | 26 | like a voyeur | he sneaks voyeuristically around the swimming pool |
| uncomprehending | 26 | lacking understanding | tried to explain to her uncomprehending husband |
| unprepossessing | 20 | creating an unfavorable or neutral first impression | - |
| sentimentalized | 27 | - | - |
| supplementation | 21 | a quantity added (e.g. to make up for a deficiency) | - |
| phenolphthalein | 28 | a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 | - |
| rationalisation | 15 | systematic organization; the act of organizing something according to a system or a rationale | - |
| reappropriating | 22 | - | - |
| reauthorization | 27 | - | - |
| prognosticating | 21 | - | - |
| psychiatrically | 30 | - | - |
| circumferential | 24 | lying around or just outside the edges or outskirts | circumferential highways around cities |
| commercializing | 33 | - | - |
| communicational | 23 | used in communication | he had few communicational grooves available for use |
| comprehensively | 30 | in an all-inclusive manner | - |
| conventionality | 23 | orthodoxy as a consequence of being conventional | - |
| externalization | 31 | attributing to outside causes | - |
| miniaturization | 26 | act of making on a greatly reduced scale | - |
| microelectronic | 23 | of or relating to or consisting of miniature electronic components | - |
| misconstruction | 21 | a kind of misinterpretation resulting from putting a wrong construction on words or actions (often deliberately) | - |
| neurobiological | 20 | of or relating to the biological study of the nervous system | - |
| noncommissioned | 22 | (of military officers) appointed from enlisted personnel | - |
| parliamentarism | 21 | - | - |
| pessimistically | 24 | with pessimism; in a pessimistic manner | he evaluated his chances for survival rather pessimistically |
| overdramatizing | 31 | - | - |
| diphenhydramine | 30 | antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness | - |
| epistemological | 22 | of or relating to epistemology | - |
| exhibitionistic | 29 | compulsively attracting attention to yourself especially by public exposure or exaggerated behavior | - |
| experimentalism | 28 | an empirical doctrine that advocates experimental principles | - |
| electrochemical | 26 | of or involving electrochemistry | - |
| acclimatisation | 21 | adaptation to a new climate (a new temperature or altitude or environment) | - |
| atherosclerosis | 20 | a stage of arteriosclerosis involving fatty deposits (atheromas) inside the arterial walls, thus narrowing the arteries | - |
| undemandingness | 20 | - | - |
| unconventionals | 20 | - | - |
| uncombativeness | 24 | - | - |
| uncinematically | 24 | - | - |
| undependability | 24 | the trait of not being dependable or reliable | - |
| unchallengingly | 25 | - | - |
| unauthentically | 23 | - | - |
| unattainability | 20 | - | - |
| twentysomething | 27 | - | - |
| transgenderisms | 19 | - | - |
| teensploitation | 17 | - | - |
| textualizations | 31 | - | - |
| sclerotherapies | 22 | - | - |
| rearticulations | 17 | - | - |
| readministering | 19 | - | - |
| reaccelerations | 19 | - | - |
| pyridostigmines | 24 | - | - |
| preuniversities | 20 | - | - |
| preinstallation | 17 | - | - |
| preexperimental | 28 | - | - |
| postsecondaries | 20 | - | - |
| recyclabilities | 24 | - | - |
| rehumanizations | 29 | - | - |
| searchabilities | 22 | - | - |
| radiculopathies | 23 | - | - |
| schizoaffective | 40 | - | - |
| sabermetrically | 24 | - | - |
| revictimization | 31 | - | - |
| retrovirologist | 19 | - | - |
| retrovirologies | 19 | - | - |
| retribalization | 26 | - | - |
| retheorizations | 27 | - | - |
| restabilization | 26 | - | - |
| resensitization | 24 | - | - |
| postmodernities | 20 | - | - |
| superenciphered | 25 | - | - |
| nonengineerings | 17 | - | - |
| decaffeinations | 24 | - | - |
| counterstepping | 22 | - | - |
| antisubversives | 23 | - | - |
| antisubversions | 20 | - | - |
| antiobscenities | 19 | - | - |
| nonoverlappings | 23 | - | - |
| nonpreferential | 20 | - | - |
| schlockmeisters | 28 | - | - |
| requalification | 29 | - | - |
| prerevisionists | 20 | - | - |
| predevaluations | 21 | - | - |
| overdiversified | 26 | - | - |
| overabstracting | 23 | - | - |
| nonstationaries | 15 | - | - |
| nonreproducible | 22 | - | - |
| antimanagements | 20 | - | - |
| antidepressions | 18 | - | - |
| anticorruptions | 19 | - | - |
| unshapelinesses | 20 | - | - |
| unsentimentally | 20 | in an unsentimental manner | unsentimentally, she threw out her dead son's toys |
| unmanageability | 23 | - | - |
| uninventiveness | 21 | - | - |
| unintellectuals | 17 | - | - |
| uninstructively | 23 | in an uninformative manner | - |
| unideologically | 22 | - | - |
| unthreateningly | 22 | - | - |
| anticlericalist | 19 | - | - |
| antiallergenics | 18 | - | - |
| fortunetellings | 19 | - | - |
| vestimentiferan | 23 | - | - |
| urogynecologist | 22 | - | - |
| urogynecologies | 22 | - | - |
| underdiagnosing | 19 | - | - |
| multicandidates | 21 | - | - |
| nondogmatically | 24 | - | - |
| nondramatically | 23 | - | - |
| nondurabilities | 18 | - | - |
| nonelasticities | 17 | - | - |
| nonfunctionally | 23 | - | - |
| nonhistorically | 23 | - | - |
| nonhysterically | 26 | - | - |
| noninflammables | 24 | - | - |
| nonprogressives | 21 | - | - |
| nondoctrinaires | 18 | - | - |
| noncooperatives | 22 | - | - |
| multicharacters | 24 | - | - |
| multicomponents | 23 | - | - |
| multiconductors | 22 | - | - |
| multielectrodes | 20 | - | - |
| multiparameters | 21 | - | - |
| nanocrystalline | 20 | - | - |
| neuroplasticity | 22 | - | - |
| neuroprotective | 22 | - | - |
| nonanalytically | 23 | - | - |
| nonanatomically | 22 | - | - |
| nonbelligerence | 20 | - | - |
| nonconvertibles | 22 | - | - |
| nonpsychoactive | 30 | not affecting the mind or mental processes | a nonpsychoactive pain reliever |
| nonrestrictives | 20 | - | - |
| nonsequentially | 27 | - | - |
| overfulfillment | 26 | - | - |
| overglamourized | 31 | - | - |
| overglamourizes | 30 | - | - |
| overinterpreted | 21 | - | - |
| overnourishment | 23 | - | - |
| overpredictions | 23 | - | - |
| overstructuring | 21 | - | - |
| participatories | 21 | - | - |
| patronizingness | 27 | - | - |
| perinatologists | 18 | - | - |
| periodontitides | 19 | - | - |
| overemotionally | 23 | - | - |
| nontheistically | 23 | - | - |
| nonuniversities | 18 | - | - |
| nonutilitarians | 15 | - | - |
| omnisexualities | 24 | - | - |
| orientalization | 24 | - | - |
| osteomyelitides | 21 | - | - |
| overabstraction | 22 | - | - |
| overambitiously | 25 | - | - |
| phenethylamines | 28 | - | - |
| misrecollecting | 22 | - | - |
| postmillennials | 19 | - | - |
| compositionists | 21 | - | - |
| corporatization | 28 | - | - |
| counteradaptive | 23 | - | - |
| counterinvasion | 20 | - | - |
| cytopathologist | 26 | - | - |
| defamiliarizing | 31 | - | - |
| defragmentation | 22 | - | - |
| dexfenfluramine | 31 | - | - |
| disintermediate | 19 | - | - |
| electroporation | 19 | - | - |
| endocannabinoid | 21 | - | - |
| enterotoxigenic | 25 | - | - |
| commoditization | 31 | - | - |
| coadministering | 21 | - | - |
| accompanimental | 25 | - | - |
| androstenedione | 17 | - | - |
| antioestrogenic | 18 | - | - |
| antituberculars | 19 | - | - |
| bioacousticians | 21 | - | - |
| biocontainments | 21 | - | - |
| bioequivalences | 31 | - | - |
| biopsychologist | 28 | - | - |
| channelopathies | 25 | - | - |
| chemopreventive | 30 | - | - |
| ethnobiological | 23 | - | - |
| ethnobiologists | 21 | - | - |
| misdevelopments | 25 | - | - |
| lissencephalies | 22 | - | - |
| microaggressive | 24 | - | - |
| microaggressors | 21 | - | - |
| microcontroller | 21 | - | - |
| microeconomists | 23 | - | - |
| microenterprise | 21 | - | - |
| misarticulation | 19 | - | - |
| exceptionalists | 26 | - | - |
| fluoroquinolone | 27 | - | - |
| glycohemoglobin | 29 | - | - |
| hemispherectomy | 32 | - | - |
| heparinisations | 20 | - | - |
| heparinizations | 29 | - | - |
| hierarchization | 32 | - | - |
| hyperefficiency | 36 | - | - |
| hypervirulences | 28 | - | - |
| hyperproductive | 31 | - | - |
| hyperhydrosises | 30 | - | - |
| hyperfemininity | 31 | - | - |
| hyperendemicity | 31 | - | - |
| translatability | 20 | - | - |
| transmutational | 17 | - | - |
| transparentised | 18 | - | - |
| transparentises | 17 | - | - |
| transparentized | 27 | - | - |
| transparentizes | 26 | - | - |
| transpirational | 17 | - | - |
| transmutability | 22 | the quality of being commutable | - |
| transmogrifying | 25 | - | - |
| translationally | 18 | - | - |
| transliterating | 16 | - | - |
| transliteration | 15 | a transcription from one alphabet to another | - |
| transliterators | 15 | - | - |
| translucidities | 18 | - | - |
| transmigrations | 18 | - | - |
| transmissometer | 19 | - | - |
| transmittancies | 19 | - | - |
| transportations | 17 | - | - |
| transposability | 22 | ability to change sequence | - |
| triangularities | 16 | - | - |
| tribromoethanol | 22 | an intravenous anesthetic | - |
| tribromomethane | 24 | colorless liquid haloform CHBr3 | - |
| tributarinesses | 17 | - | - |
| trichinisations | 20 | - | - |
| trichinizations | 29 | - | - |
| traumatonasties | 17 | - | - |
| transpositional | 17 | - | - |
| transsexualisms | 24 | - | - |
| transubstantial | 17 | - | - |
| transvaluations | 18 | - | - |
| transvestitisms | 20 | - | - |
| traumatisations | 17 | - | - |
| traumatizations | 26 | - | - |
| traumatological | 20 | - | - |
| trichloroacetic | 24 | - | - |
| transistorizing | 25 | - | - |
| tonsillectomies | 19 | - | - |
| traditionalised | 17 | - | - |
| traditionalises | 16 | - | - |
| traditionalisms | 18 | - | - |
| traditionalists | 16 | - | - |
| traditionalized | 26 | - | - |
| traditionalizes | 25 | - | - |
| toxicologically | 30 | - | - |
| topochemistries | 24 | - | - |
| topographically | 28 | with regard to topography | the geological environment is the primary factor in determining the character of a country not only topographically but historically |
| torrentialities | 15 | - | - |
| totalitarianise | 15 | - | - |
| totalitarianize | 24 | - | - |
| trainspotterish | 20 | - | - |
| tranquilisation | 24 | - | - |
| tranquilisingly | 28 | - | - |
| transfigurement | 21 | - | - |
| transformations | 20 | - | - |
| transfusionists | 18 | - | - |
| transgressional | 16 | - | - |
| transgressively | 22 | - | - |
| transhistorical | 20 | - | - |
| transientnesses | 15 | - | - |
| transilluminate | 17 | - | - |
| transferability | 23 | the quality of being transferable or exchangeable | sterling transferability affords a means of multilateral settlement for....trade between nondollar countries |
| tranquilization | 33 | - | - |
| tranquilizingly | 37 | - | - |
| transactionally | 20 | - | - |
| transaminations | 17 | - | - |
| transcendencies | 20 | - | - |
| transcriptional | 19 | - | - |
| transcriptively | 25 | - | - |
| transistorising | 16 | - | - |
| ubiquitinations | 26 | - | - |
| ultramicrometer | 21 | - | - |
| ultramicroscope | 23 | light microscope that uses scattered light to show particles too small to see with ordinary microscopes | - |
| ultramicroscopy | 26 | - | - |
| ultramicrotomes | 21 | - | - |
| ultramodernisms | 20 | - | - |
| ultramodernists | 18 | - | - |
| ultramontanisms | 19 | - | - |
| ultraliberalism | 19 | - | - |
| ultrafiltration | 18 | - | - |
| ultimogenitures | 18 | - | - |
| ultracentrifuge | 21 | a high speed centrifuge used to determine the relative molecular masses of large molecules in high polymers and proteins | - |
| ultracommercial | 23 | - | - |
| ultraconvenient | 20 | - | - |
| ultracrepidated | 21 | - | - |
| ultracrepidates | 20 | - | - |
| ultrademocratic | 22 | - | - |
| ultrafastidious | 19 | - | - |
| ultramontanists | 17 | - | - |
| unanimousnesses | 17 | - | - |
| unanswerability | 23 | - | - |
| unanticipatedly | 23 | - | - |
| unapostolically | 22 | - | - |
| unappreciations | 21 | - | - |
| unapprehensible | 24 | - | - |
| unascertainable | 19 | not able to be ascertained; resisting discovery | - |
| unamiablenesses | 19 | - | - |
| ultravirilities | 18 | - | - |
| unacceptability | 26 | unsatisfactoriness by virtue of not conforming to approved standards | - |
| unaccommodating | 25 | not accommodating | the unaccommodating bus driver pulled out while she was banging on the door |
| unacquaintances | 28 | - | - |
| unadvisableness | 21 | - | - |
| unadvisednesses | 20 | - | - |
| unassailability | 20 | - | - |
| ubiquitarianism | 28 | - | - |
| trichloroethane | 23 | a heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant; causes cancer and liver and lung damage | - |
| trinitrotoluols | 15 | - | - |
| tripersonalisms | 19 | - | - |
| tripersonalists | 17 | - | - |
| triphenylamines | 25 | - | - |
| trisoctahedrons | 21 | - | - |
| trisyllabically | 25 | - | - |
| trituberculisms | 21 | - | - |
| trinitrophenols | 20 | - | - |
| trinitrocresols | 17 | - | - |
| trichomonacidal | 25 | - | - |
| trichomonacides | 25 | - | - |
| trifluoperazine | 29 | - | - |
| trigonometrical | 20 | - | - |
| trihalomethanes | 23 | - | - |
| triiodomethanes | 21 | - | - |
| trimethylamines | 25 | - | - |
| trinitrobenzene | 26 | - | - |
| trivialisations | 18 | - | - |
| trivializations | 27 | - | - |
| tropicalisation | 19 | - | - |
| trypanosomiasis | 22 | - | - |
| tuberculisation | 19 | - | - |
| tuberculization | 28 | - | - |
| tumorgenicities | 20 | - | - |
| tyndallimetries | 21 | - | - |
| typographically | 31 | in a typographic way | - |
| trypanosomiases | 22 | - | - |
| tropicalization | 28 | - | - |
| tomboyishnesses | 25 | - | - |
| telangiectasias | 18 | - | - |
| teletypesetting | 21 | - | - |
| teletypewriters | 23 | - | - |
| telomerisations | 17 | - | - |
| telomerizations | 26 | - | - |
| temerariousness | 17 | - | - |
| temperabilities | 21 | - | - |
| teleprocessings | 20 | - | - |
| telautographies | 21 | - | - |
| teleconnections | 19 | - | - |
| telegraphically | 26 | in a short and concise manner | - |
| telejournalisms | 24 | - | - |
| telejournalists | 22 | - | - |
| telekinetically | 24 | - | - |
| temporarinesses | 19 | - | - |
| teratocarcinoma | 21 | - | - |
| teratogenicists | 18 | - | - |
| tergiversations | 19 | - | - |
| terminabilities | 19 | - | - |
| terrestrialness | 15 | - | - |
| territorialised | 16 | - | - |
| territorialises | 15 | - | - |
| territorialisms | 17 | - | - |
| tentativenesses | 18 | - | - |
| tentaculiferous | 20 | - | - |
| tenaciousnesses | 17 | - | - |
| tendenciousness | 18 | - | - |
| tendentiousness | 16 | an intentional and controversial bias | - |
| tenosynovitises | 21 | - | - |
| tenovaginitises | 19 | - | - |
| territorialists | 15 | - | - |
| tectibranchiate | 24 | - | - |
| symphysiotomies | 30 | - | - |
| syncretisations | 20 | - | - |
| syncretizations | 29 | - | - |
