15-letter words ending with Y
Dive into the specific realm of 15-letter words that conclude with the letter Y. This focused section reveals the fascinating ways in which words of this particular length, ending with Y, contribute to the richness of the English language. Whether it's for expanding your vocabulary, solving puzzles, or simply for the love of words, discover how these terms uniquely blend length and ending sound.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| 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 |
| internationally | 18 | throughout the world | She is internationally known |
| unconditionally | 21 | in an unqualified manner | - |
| technologically | 26 | by means of technology | technologically impossible |
| unintentionally | 18 | without intention; in an unintentional manner | she hit him unintentionally |
| instantaneously | 18 | without any delay | - |
| environmentally | 23 | for the environment | the new recycling policy is environmentally safe |
| inappropriately | 24 | in an inappropriate manner | he was inappropriately dressed |
| physiologically | 29 | of or relating to physiological processes; with respect to physiology | physiologically ready |
| disrespectfully | 26 | in a disrespectful manner | he treats his parents rather disrespectfully |
| philosophically | 30 | in a philosophic manner | she took it philosophically |
| heterosexuality | 28 | a sexual attraction to (or sexual relations with) persons of the opposite sex | - |
| chronologically | 26 | with respect to chronology | he is chronologically older |
| conscientiously | 22 | with extreme conscientiousness | - |
| incompatibility | 26 | the relation between propositions that cannot both be true at the same time | - |
| developmentally | 26 | with respect to development | developmentally retarded |
| surreptitiously | 20 | in a surreptitious manner | he was watching her surreptitiously as she waited in the hotel lobby |
| intellectuality | 20 | - | - |
| proportionately | 22 | to a proportionate degree | your salary will rise proportionately to your workload |
| 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 | - |
| aerodynamically | 26 | - | - |
| therapeutically | 25 | for therapeutic purposes | - |
| cardiopulmonary | 25 | of or pertaining to or affecting both the heart and the lungs and their functions | cardiopulmonary resuscitation |
| infinitesimally | 23 | - | - |
| disappointingly | 24 | in a disappointing manner | the discoverer of argon, Sir William Ramsay, looked disappointingly ordinary |
| compassionately | 24 | in a compassionate manner | - |
| controversially | 23 | involving controversy | - |
| inconspicuously | 24 | in a manner intended to avoid attracting attention | he had entered the room inconspicuously |
| invulnerability | 23 | having the strength to withstand attack | - |
| instrumentality | 20 | an artifact (or system of artifacts) that is instrumental in accomplishing some end | - |
| neurophysiology | 27 | the branch of neuroscience that studies the physiology of the nervous system | - |
| unceremoniously | 22 | in an unceremonious manner | he was dismissed unceremoniously |
| unprecedentedly | 24 | in an unprecedented manner | - |
| 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 |
| psychopathology | 34 | the branch of medicine dealing with the diagnosis and treatment of mental disorders | - |
| correspondingly | 24 | - | - |
| heartbreakingly | 28 | - | - |
| inconsiderately | 21 | without consideration; in an inconsiderate manner | inconsiderately, he asked to be invited for dinner |
| neuropsychiatry | 28 | the branch of medicine dealing with mental disorders attributable to diseases of the nervous system | - |
| palaeopathology | 26 | the study of disease of former times (as inferred from fossil evidence) | - |
| demographically | 29 | - | - |
| 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 |
| architecturally | 25 | with regard to architecture | this building is ugly, but architecturally interesting |
| temperamentally | 24 | by temperament | temperamentally suited to each other |
| voyeuristically | 26 | like a voyeur | he sneaks voyeuristically around the swimming pool |
| psychiatrically | 30 | - | - |
| comprehensively | 30 | in an all-inclusive manner | - |
| conventionality | 23 | orthodoxy as a consequence of being conventional | - |
| interrogatively | 22 | with curiosity | - |
| interdependency | 24 | a reciprocal relation between interdependent entities (objects or individuals or groups) | - |
| pessimistically | 24 | with pessimism; in a pessimistic manner | he evaluated his chances for survival rather pessimistically |
| uncinematically | 24 | - | - |
| undependability | 24 | the trait of not being dependable or reliable | - |
| unchallengingly | 25 | - | - |
| unauthentically | 23 | - | - |
| unattainability | 20 | - | - |
| sabermetrically | 24 | - | - |
| unspectacularly | 24 | - | - |
| unsentimentally | 20 | in an unsentimental manner | unsentimentally, she threw out her dead son's toys |
| unmanageability | 23 | - | - |
| uninstructively | 23 | in an uninformative manner | - |
| unideologically | 22 | - | - |
| unthreateningly | 22 | - | - |
| nondogmatically | 24 | - | - |
| nondramatically | 23 | - | - |
| nonfunctionally | 23 | - | - |
| nonhistorically | 23 | - | - |
| nonhomosexually | 30 | - | - |
| nonhysterically | 26 | - | - |
| nonjudgmentally | 29 | - | - |
| neuroplasticity | 22 | - | - |
| nonanalytically | 23 | - | - |
| nonanatomically | 22 | - | - |
| nonconsensually | 20 | - | - |
| nonsequentially | 27 | - | - |
| overexuberantly | 30 | - | - |
| overemotionally | 23 | - | - |
| nontheistically | 23 | - | - |
| overambitiously | 25 | - | - |
| irresistability | 20 | - | - |
| indigestability | 22 | - | - |
| hemispherectomy | 32 | - | - |
| hyperefficiency | 36 | - | - |
| hyperfemininity | 31 | - | - |
| hyperendemicity | 31 | - | - |
| translatability | 20 | - | - |
| transmutability | 22 | the quality of being commutable | - |
| translationally | 18 | - | - |
| transposability | 22 | ability to change sequence | - |
| toxicologically | 30 | - | - |
| 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 |
| tranquilisingly | 28 | - | - |
| transgressively | 22 | - | - |
| transferability | 23 | the quality of being transferable or exchangeable | sterling transferability affords a means of multilateral settlement for....trade between nondollar countries |
| tranquilizingly | 37 | - | - |
| transactionally | 20 | - | - |
| transcriptively | 25 | - | - |
| ultramicroscopy | 26 | - | - |
| ultrasonography | 24 | using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs | - |
| unanswerability | 23 | - | - |
| unanticipatedly | 23 | - | - |
| unapostolically | 22 | - | - |
| unacceptability | 26 | unsatisfactoriness by virtue of not conforming to approved standards | - |
| unadulteratedly | 20 | - | - |
| unassailability | 20 | - | - |
| trisyllabically | 25 | - | - |
| typographically | 31 | in a typographic way | - |
| telephotography | 29 | photography using a telephoto lens | - |
| telegraphically | 26 | in a short and concise manner | - |
| telekinetically | 24 | - | - |
| tenderheartedly | 23 | - | - |
| synecdochically | 31 | - | - |
| synecologically | 26 | - | - |
| synergistically | 24 | (of group) in a synergistic or cooperative manner | - |
| symptomatically | 29 | by symptoms | - |
| synarthrodially | 25 | - | - |
| tachometrically | 27 | - | - |
| tachymetrically | 30 | - | - |
| thermostability | 25 | - | - |
| thermochemistry | 30 | the branch of chemistry that studies the relation between chemical action and the amount of heat absorbed or generated | - |
| thoroughgoingly | 27 | - | - |
| tetartohedrally | 22 | - | - |
| thalassotherapy | 26 | - | - |
| theorematically | 25 | - | - |
| untraditionally | 19 | - | - |
| unsymmetrically | 27 | in an asymmetrical manner | - |
| unsubstantially | 20 | - | - |
| untrustworthily | 24 | - | - |
| unverifiability | 26 | - | - |
| unrevolutionary | 21 | - | - |
| unrealistically | 20 | in an unrealistic manner | his expectations were unrealistically high |
| unquestioningly | 28 | in an unquestioning manner | he followed his leader unquestioningly |
| vivisectionally | 26 | - | - |
| viscoelasticity | 25 | - | - |
| ventriloquially | 30 | - | - |
| vicissitudinary | 24 | - | - |
| violinistically | 23 | - | - |
| unprogressively | 24 | - | - |
| uncooperatively | 25 | - | - |
| unconstrainedly | 21 | - | - |
| unchallengeably | 26 | - | - |
| unbelievability | 25 | - | - |
| unchangeability | 26 | the quality of being unchangeable; having a marked tendency to remain unchanged | - |
| uncomplainingly | 25 | without complaining | an equally gallant little wife and mother uncomplainingly keeping up the production of tasty and nourishing meals |
| uncomplaisantly | 24 | - | - |
| uncomplimentary | 26 | showing or representing unfavorably | an uncomplimentary dress |
| uninformatively | 26 | in an uninformative manner | `I can't tell you when the manager will arrive,' he said rather uninformatively |
| unintelligently | 19 | in an unintelligent manner | he acted rather unintelligently in this crisis |
| uninterestingly | 19 | in an uninteresting manner | - |
| unintermittedly | 21 | - | - |
| uninterruptedly | 21 | without interruption | this pleasant state of affairs had continued peacefully and uninterruptedly for many years |
| unpretentiously | 20 | in an unpretentious manner | she was unpretentiously dressed even though she was the guest of honor |
| unobjectionably | 31 | - | - |
| unparliamentary | 22 | so rude and abusive as to be unsuitable for parliament | - |
| unpatriotically | 22 | in an unpatriotic manner | unpatriotically he contrived a way of avoiding military service |
| unprofitability | 25 | the quality of affording no gain or no benefit or no profit | - |
| unimaginatively | 24 | in a matter-of-fact manner | - |
| understandingly | 21 | with understanding | she nodded understandingly |
| unemployability | 27 | - | - |
| unexceptionably | 31 | - | - |
| unexceptionally | 29 | - | - |
| unextraordinary | 26 | - | - |
| ungrammatically | 25 | in an ungrammatical manner | this child speaks ungrammatically |
| unidiomatically | 23 | - | - |
| xeroradiography | 32 | radiography using X-rays and xerographic (rather than roentgenographic) techniques | - |
| xerographically | 33 | - | - |
| xenomorphically | 34 | - | - |
| schoolmistressy | 25 | - | - |
| scintillatingly | 21 | - | - |
| sculpturesquely | 31 | - | - |
| saprophytically | 30 | - | - |
| sanctimoniously | 22 | in a sanctimonious manner | she was sanctimoniously criticizing everybody |
| sesquicentenary | 29 | - | - |
| serendipitously | 21 | - | - |
| septentrionally | 20 | - | - |
| significatively | 27 | - | - |
| silviculturally | 23 | - | - |
| sidesplittingly | 22 | in a very humorous manner | - |
| semiconsciously | 24 | - | - |
| seismologically | 23 | - | - |
| semidocumentary | 25 | - | - |
| semipornography | 28 | - | - |
| roundaboutility | 21 | - | - |
| reproducibility | 25 | the quality of being reproducible | - |
| remonstratingly | 21 | - | - |
| remonstratively | 23 | - | - |
| rememberability | 26 | - | - |
| rhombenporphyry | 35 | - | - |
| rontgenotherapy | 24 | - | - |
| roentgenography | 25 | radiography that uses X-rays to produce a roentgenogram | - |
| revolutionarily | 21 | - | - |
| resurrectionary | 20 | - | - |
| retrogressively | 22 | - | - |
| superabundantly | 23 | - | - |
| superefficiency | 30 | - | - |
| subreptitiously | 22 | - | - |
| subspecifically | 29 | - | - |
| subterraneously | 20 | - | - |
| substitutionary | 20 | - | - |
| supplementarily | 24 | - | - |
| suppositionally | 22 | - | - |
| suppressibility | 24 | - | - |
| superstitiously | 20 | in a superstitious manner | superstitiously he refused to travel on Friday the 13th |
| supranationally | 20 | - | - |
| symbolistically | 27 | - | - |
| syllogistically | 24 | - | - |
| sycophantically | 30 | - | - |
| superincumbency | 28 | - | - |
| superintendency | 23 | - | - |
| supernationally | 20 | - | - |
| superplasticity | 24 | - | - |
| stalactitically | 22 | - | - |
| splendiferously | 24 | - | - |
| stalagmitically | 23 | - | - |
| socialistically | 22 | - | - |
| socioculturally | 22 | - | - |
| slumpflationary | 25 | - | - |
| southwestwardly | 28 | in a southwestward direction | - |
| sophisticatedly | 26 | - | - |
| solipsistically | 22 | - | - |
| somatologically | 23 | - | - |
| stereochemistry | 25 | - | - |
| stereologically | 21 | - | - |
| stereotaxically | 27 | - | - |
| staphylorrhaphy | 34 | - | - |
| stereotypically | 25 | in a stereotypical manner | - |
| poststimulatory | 22 | - | - |
| postulationally | 20 | - | - |
| postoperatively | 25 | after the operation | remove postoperatively |
| precipitability | 26 | - | - |
| polygenetically | 26 | - | - |
| polygraphically | 31 | - | - |
| polymorphically | 32 | - | - |
| preternaturally | 20 | in a supernatural manner | she was preternaturally beautiful |
| presynaptically | 27 | - | - |
| procrastinatory | 22 | - | - |
| problematically | 26 | in such a way as to pose a problem | - |
| prefiguratively | 27 | - | - |
| prehistorically | 25 | - | - |
| preferentiality | 23 | - | - |
| prepossessingly | 23 | - | - |
| premillennially | 22 | - | - |
| prepositionally | 22 | as a preposition | - |
| photochemically | 32 | - | - |
| photoelasticity | 25 | - | - |
| photometrically | 27 | by photometric means | photometrically measured |
| phonogramically | 28 | - | - |
| planimetrically | 24 | - | - |
| planometrically | 24 | - | - |
| plasmolytically | 27 | - | - |
| pinocytotically | 27 | - | - |
| pisciculturally | 24 | - | - |
| plethysmography | 34 | - | - |
| pluralistically | 22 | - | - |
| plutocratically | 24 | - | - |
| plenipotentiary | 22 | a diplomat who is fully authorized to represent his or her government | - |
| platitudinously | 21 | - | - |
| phototropically | 27 | - | - |
| phototypography | 34 | - | - |
| photoxylography | 39 | - | - |
| phototopography | 31 | - | - |
| phototactically | 27 | - | - |
| phototelegraphy | 29 | - | - |
| phrenologically | 26 | - | - |
| piezometrically | 33 | - | - |
| physiopathology | 32 | - | - |
| phytochemically | 35 | - | - |
| recognisability | 23 | - | - |
| quodlibetically | 32 | - | - |
| questionability | 29 | - | - |
| radioautography | 25 | - | - |
| radioscopically | 25 | - | - |
| radiotelegraphy | 25 | the use of radio to send telegraphic messages (usually by Morse code) | - |
| radiochemically | 28 | - | - |
| radiometrically | 23 | - | - |
| radiophonically | 26 | - | - |
| reduplicatively | 26 | - | - |
| recognizability | 32 | - | - |
| reconcilability | 24 | - | - |
| propositionally | 22 | - | - |
| proteolytically | 25 | - | - |
| proprietorially | 22 | - | - |
| psephologically | 28 | - | - |
| progressionally | 21 | - | - |
| programmability | 27 | - | - |
| proportionality | 22 | harmonious arrangement or relation of parts or elements within a whole (as in a design) | - |
| pusillanimously | 22 | with a lack of courage and determination | - |
| pyroelectricity | 27 | generation of an electric charge on certain crystals (such as tourmaline) as a result of a change in temperature | - |
| pyrophotography | 34 | - | - |
| pyrotechnically | 30 | - | - |
| quatercentenary | 29 | the 400th anniversary (or the celebration of it) | - |
| psychedelically | 31 | - | - |
| psychobiography | 36 | - | - |
| pseudomutuality | 23 | - | - |
| pseudopregnancy | 26 | - | - |
| psychosexuality | 35 | the mental representation of sexual activities | - |
| psychochemistry | 35 | - | - |
| psychodelically | 31 | - | - |
| psychogenically | 31 | - | - |
| orthopaedically | 26 | - | - |
| oreographically | 26 | - | - |
| morphophonology | 31 | - | - |
| multiculturally | 22 | - | - |
| unadventurously | 22 | - | - |
| psychosociology | 31 | - | - |
| radiogoniometry | 22 | - | - |
| conscionability | 24 | - | - |
| colouristically | 22 | - | - |
| anarchistically | 25 | - | - |
| esemplastically | 24 | - | - |
| circumambiently | 28 | - | - |
| cinemicrography | 30 | - | - |
| cineangiography | 27 | - | - |
| cholangiography | 30 | roentgenographic examination of the bile ducts after a contrast medium has been injected | - |
| cholecystectomy | 32 | surgical removal of the gall bladder (usually for relief of gallstone pain) | - |
| cholecystostomy | 30 | - | - |
| cholinergically | 26 | - | - |
| commemoratively | 29 | - | - |
| colposcopically | 28 | - | - |
| combinatorially | 24 | - | - |
| commiseratingly | 25 | - | - |
| commiseratively | 27 | - | - |
| compartmentally | 26 | - | - |
| communistically | 26 | - | - |
| communicability | 28 | - | - |
| communicatively | 29 | - | - |
| cleistogamously | 23 | - | - |
| climacterically | 26 | - | - |
| collaboratively | 25 | - | - |
| coeducationally | 23 | - | - |
| coenzymatically | 36 | - | - |
| coinstantaneity | 20 | - | - |
| brokenheartedly | 28 | - | - |
| bisymmetrically | 29 | - | - |
| biostratigraphy | 26 | - | - |
| biomechanically | 29 | - | - |
| biorhythmically | 33 | - | - |
| bloodcurdlingly | 25 | - | - |
| chemoautotrophy | 30 | - | - |
| chemopsychiatry | 35 | - | - |
| chemotactically | 29 | - | - |
| chemotropically | 29 | - | - |
| cataclysmically | 29 | - | - |
| catallactically | 24 | - | - |
| catechistically | 27 | - | - |
| carcinogenicity | 25 | - | - |
| cenogenetically | 23 | - | - |
| correspondently | 23 | - | - |
| corroboratively | 25 | - | - |
| counteractively | 25 | in a counteractive manner | - |
| coulometrically | 24 | - | - |
| crystallography | 29 | the branch of science that studies the formation and structure of crystals | - |
| cytogenetically | 26 | - | - |
| cytoplasmically | 29 | by means of cytoplasm | - |
| craniologically | 23 | - | - |
| counterstrategy | 21 | - | - |
| countertendency | 23 | - | - |
| condescendingly | 25 | with condescension; in a patronizing manner | he treats his secretary condescendingly |
| conjugationally | 28 | - | - |
| conjunctionally | 29 | - | - |
| congressionally | 21 | - | - |
| complimentarily | 26 | - | - |
| compositionally | 24 | - | - |
| compressibility | 26 | the property of being able to occupy less space | - |
| complementarily | 26 | - | - |
| complementarity | 26 | a relation between two opposite states or principles that together exhaust the possibilities | - |
| computationally | 24 | with regard to computation | computationally, this is a tricky problem |
| concentratively | 25 | - | - |
| contradictively | 26 | - | - |
| contradictorily | 23 | in a contradictory manner | he argued contradictorily |
| contractibility | 24 | - | - |
| contractability | 24 | - | - |
| controllability | 22 | - | - |
| consideratively | 24 | - | - |
| consequentially | 29 | having consequence | - |
| consentaneously | 20 | - | - |
| contemplatively | 27 | - | - |
| contemporaneity | 24 | the quality of belonging to the same period of time | - |
| contemptibility | 26 | unworthiness by virtue of lacking higher values | - |
| harmonistically | 25 | - | - |
| hemodynamically | 31 | - | - |
| heliocentricity | 25 | - | - |
| heliometrically | 25 | - | - |
| heliotropically | 25 | - | - |
| goniometrically | 23 | - | - |
| gramophonically | 28 | - | - |
| grandiloquently | 29 | in a rhetorically grandiloquent manner | - |
| gravimetrically | 26 | - | - |
| gravitationally | 22 | with respect to gravitation | gravitationally strong forces |
| homoplastically | 27 | - | - |
| holoblastically | 25 | - | - |
| holographically | 29 | - | - |
| homeopathically | 30 | - | - |
| homocentrically | 27 | - | - |
| horticulturally | 23 | by means of horticulture | - |
| heterocercality | 25 | - | - |
| heterogeneously | 22 | - | - |
| hermeneutically | 25 | - | - |
| histochemically | 30 | - | - |
| histophysiology | 30 | - | - |
| heterosociality | 23 | - | - |
| gnotobiotically | 23 | - | - |
| fetishistically | 26 | - | - |
| fideicommissary | 28 | - | - |
| expostulatingly | 28 | - | - |
| exterritorially | 25 | - | - |
| extracellularly | 27 | - | - |
| extrajudicially | 35 | - | - |
| geomagnetically | 24 | - | - |
| gastronomically | 23 | - | - |
| geostrophically | 26 | - | - |
| geotectonically | 23 | - | - |
| formalistically | 25 | - | - |
| gamogenetically | 24 | - | - |
| fungistatically | 24 | - | - |
| inaccessibility | 24 | the quality of not being available when needed | - |
| inadmissibility | 23 | unacceptability as a consequence of not being admissible | - |
| inapplicability | 26 | irrelevance by virtue of being inapplicable to the matter at hand | - |
| incommensurably | 26 | - | - |
| incommutability | 26 | the quality of being not interchangeable | - |
| incomparability | 26 | - | - |
| incalculability | 24 | - | - |
| imprescriptibly | 28 | - | - |
| immunopathology | 28 | the branch of immunology that deals with pathologies of the immune system | - |
| impenetrability | 24 | incomprehensibility by virtue of being too dense to understand | - |
| imperishability | 27 | the property of being resistant to decay | he advertised the imperishability of the product |
| imponderability | 25 | - | - |
| indisputability | 23 | the quality of being beyond question or dispute or doubt | - |
| indissolubility | 21 | - | - |
| indistinctively | 24 | - | - |
| ineffaceability | 28 | - | - |
| inexplicability | 31 | - | - |
| inexpugnability | 30 | - | - |
| inextensibility | 27 | - | - |
| inextricability | 29 | - | - |
| inefficaciously | 28 | in an ineffective manner | - |
| ineradicability | 23 | - | - |
| indiscretionary | 21 | - | - |
| incorrigibility | 23 | - | - |
| inconsolability | 22 | - | - |
| incomputability | 26 | - | - |
| inconsecutively | 25 | - | - |
| indeterminately | 21 | - | - |
| indigestibility | 22 | the property of being difficult to digest | - |
| indefeasibility | 24 | - | - |
| indefectibility | 26 | - | - |
| indefensibility | 24 | - | - |
| hypermutability | 30 | - | - |
| hyperphysically | 36 | - | - |
| hyperreactivity | 31 | - | - |
| hypnotisability | 28 | - | - |
| hydropathically | 32 | - | - |
| hydrostatically | 27 | - | - |
| hydrotropically | 29 | - | - |
| hydrometrically | 29 | - | - |
| hydrometallurgy | 28 | - | - |
| hygrometrically | 29 | - | - |
| hypercritically | 30 | - | - |
| hygroscopically | 31 | - | - |
| hylozoistically | 35 | - | - |
| immeasurability | 24 | - | - |
| immensurability | 24 | - | - |
| immunogenically | 25 | - | - |
| immunochemistry | 29 | the field of chemistry concerned with chemical processes in immunology (such as chemical studies of antigens and antibodies) | - |
| immunologically | 25 | from the point of view of immunology | - |
| hypnotizability | 37 | - | - |
| hypsometrically | 30 | - | - |
| ideographically | 27 | in an idiographic manner | it's written ideographically |
| idiomorphically | 28 | - | - |
| intravascularly | 23 | - | - |
| introspectively | 25 | - | - |
| irredeemability | 23 | - | - |
| irreductibility | 23 | - | - |
| ionospherically | 25 | - | - |
| irreformability | 25 | - | - |
| intertextuality | 25 | - | - |
| interrogatorily | 19 | - | - |
| interrogatingly | 20 | - | - |
| intertwistingly | 22 | - | - |
| interuniversity | 21 | - | - |
| intradermically | 23 | - | - |
| intramuscularly | 22 | in an intramuscular way | administer the drug intramuscularly |
| intransigeantly | 19 | - | - |
| intracerebrally | 22 | - | - |
| intervisibility | 23 | - | - |
| intracellularly | 20 | - | - |
| labyrinthically | 28 | - | - |
| lackadaisically | 27 | in an idle and lackadaisical manner | he was hanging around the house lackadaisically |
| lexicologically | 30 | - | - |
| lepidopterology | 24 | the branch of entomology dealing with Lepidoptera | - |
| knowledgability | 29 | - | - |
| irrefragability | 24 | - | - |
| irreversibility | 23 | the quality of being irreversible (once done it cannot be changed) | - |
| irresolvability | 23 | - | - |
