15-letter words starting with I
Embark on a linguistic journey with words that begin with the letter I. This section showcases how I at the start shapes the identity and sound of various words. From commonly used terms to rare finds, explore the diverse range of words that start with I, enriching your vocabulary and appreciation for language.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| internationally | 18 | throughout the world | She is internationally known |
| insubordination | 18 | an insubordinate act | - |
| instantaneously | 18 | without any delay | - |
| inappropriately | 24 | in an inappropriate manner | he was inappropriately dressed |
| inconsequential | 26 | lacking worth or importance | his work seems trivial and inconsequential |
| interchangeable | 23 | capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability | interchangeable electric outlets |
| incompatibility | 26 | the relation between propositions that cannot both be true at the same time | - |
| impressionistic | 21 | relating to or characteristic of Impressionism | - |
| inconveniencing | 23 | - | - |
| improvisational | 22 | - | - |
| individualistic | 22 | marked by or expressing individuality | an individualistic way of dressing |
| instrumentation | 17 | the act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments | - |
| intellectualism | 19 | - | - |
| intellectuality | 20 | - | - |
| interventionist | 18 | - | - |
| inquisitiveness | 27 | a state of active curiosity | - |
| infinitesimally | 23 | - | - |
| intellectualize | 26 | - | - |
| interconnection | 19 | a state of being connected reciprocally | an interconnection between the two buildings |
| 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 | - |
| incommensurable | 23 | impossible to measure or compare in value or size or excellence | - |
| incomprehension | 24 | an inability to understand | his incomprehension of the consequences |
| inconsiderately | 21 | without consideration; in an inconsiderate manner | inconsiderately, he asked to be invited for dinner |
| interrogatories | 16 | - | - |
| interdependence | 21 | a reciprocal relation between interdependent entities (objects or individuals or groups) | - |
| ineffectiveness | 26 | lacking the power to be effective | - |
| incomprehensive | 27 | not comprehensive | - |
| interrogatively | 22 | with curiosity | - |
| interventionism | 20 | - | - |
| instrumentalist | 17 | someone who plays a musical instrument (as a profession) | - |
| intensification | 20 | action that makes something stronger or more extreme | - |
| interdependency | 24 | a reciprocal relation between interdependent entities (objects or individuals or groups) | - |
| interoperatives | 20 | - | - |
| interelectrodes | 18 | - | - |
| interruptedness | 18 | - | - |
| intersectionals | 17 | - | - |
| irresistability | 20 | - | - |
| isothiocyanates | 23 | - | - |
| interdependents | 19 | - | - |
| indigestability | 22 | - | - |
| immersivenesses | 22 | - | - |
| immunostimulant | 21 | - | - |
| informatisation | 20 | - | - |
| informatization | 29 | - | - |
| interinfluenced | 21 | - | - |
| interbehaviours | 23 | - | - |
| inaccessibility | 24 | the quality of not being available when needed | - |
| inadmissibility | 23 | unacceptability as a consequence of not being admissible | - |
| inadvisableness | 21 | - | - |
| inalienableness | 17 | - | - |
| inalterableness | 17 | - | - |
| inanimatenesses | 17 | - | - |
| inapplicability | 26 | irrelevance by virtue of being inapplicable to the matter at hand | - |
| inappreciations | 21 | - | - |
| imputablenesses | 21 | - | - |
| impulsivenesses | 22 | - | - |
| improbabilities | 23 | - | - |
| improvabilities | 24 | - | - |
| improvisatorial | 22 | - | - |
| improvisatrices | 24 | - | - |
| improvisatrixes | 29 | - | - |
| improvvisatores | 25 | - | - |
| improvvisatrice | 27 | - | - |
| inapprehensible | 24 | - | - |
| inapprehensions | 22 | - | - |
| incessantnesses | 17 | - | - |
| inclementnesses | 19 | - | - |
| inclusivenesses | 20 | - | - |
| incommensurably | 26 | - | - |
| incommunicative | 26 | not inclined to talk or give information or express opinions | - |
| incommutability | 26 | the quality of being not interchangeable | - |
| incomparability | 26 | - | - |
| incentivization | 29 | - | - |
| incentivisation | 20 | - | - |
| inarticulations | 17 | - | - |
| inattentiveness | 18 | a lack of attentiveness (as to children or helpless people) | - |
| inaudiblenesses | 18 | - | - |
| incalculability | 24 | - | - |
| incandescencies | 22 | - | - |
| incapablenesses | 21 | - | - |
| incapaciousness | 21 | - | - |
| incapacitations | 21 | - | - |
| imprescriptibly | 28 | - | - |
| immunopathology | 28 | the branch of immunology that deals with pathologies of the immune system | - |
| impeccabilities | 25 | - | - |
| impecuniosities | 21 | - | - |
| impecuniousness | 21 | a state of lacking money | - |
| impenetrability | 24 | incomprehensibility by virtue of being too dense to understand | - |
| imperfectnesses | 24 | - | - |
| imperiousnesses | 19 | - | - |
| imperishability | 27 | the property of being resistant to decay | he advertised the imperishability of the product |
| impermeableness | 23 | the property of something that cannot be pervaded by a liquid | - |
| impassivenesses | 22 | - | - |
| impassionedness | 20 | - | - |
| immunoreactions | 21 | - | - |
| immunotherapies | 24 | - | - |
| immutablenesses | 21 | - | - |
| impalpabilities | 23 | - | - |
| impartialnesses | 19 | - | - |
| impartibilities | 21 | - | - |
| impassabilities | 21 | - | - |
| impassibilities | 21 | - | - |
| imperscriptible | 25 | - | - |
| impersonalising | 20 | - | - |
| impersonalities | 19 | - | - |
| importabilities | 21 | - | - |
| importunateness | 19 | - | - |
| impossibilities | 21 | - | - |
| imposthumations | 24 | - | - |
| impoverishments | 27 | - | - |
| impracticalness | 23 | - | - |
| imprecisenesses | 21 | - | - |
| impregnableness | 22 | - | - |
| imponderability | 25 | - | - |
| impoliticnesses | 21 | - | - |
| impersonalizing | 29 | - | - |
| imperturbations | 21 | - | - |
| imperviableness | 24 | - | - |
| impetuousnesses | 19 | - | - |
| implacabilities | 23 | - | - |
| implausibleness | 21 | the quality of provoking disbelief | - |
| implementations | 21 | - | - |
| implicativeness | 24 | - | - |
| imprescriptible | 25 | - | - |
| indisputability | 23 | the quality of being beyond question or dispute or doubt | - |
| indoctrinations | 18 | - | - |
| indomitableness | 20 | - | - |
| indubitableness | 20 | - | - |
| inductivenesses | 21 | - | - |
| industrialising | 17 | - | - |
| industrializing | 26 | - | - |
| industriousness | 16 | persevering determination to perform a task | - |
| ineducabilities | 20 | - | - |
| indivisibleness | 21 | - | - |
| individualizing | 30 | - | - |
| indissolubility | 21 | - | - |
| indistinctively | 24 | - | - |
| indistributable | 20 | - | - |
| individualisers | 20 | - | - |
| individualising | 21 | - | - |
| individualities | 20 | - | - |
| individualizers | 29 | - | - |
| ineffablenesses | 23 | - | - |
| ineffaceability | 28 | - | - |
| inexorabilities | 24 | - | - |
| inexpensiveness | 27 | the quality of being affordable | - |
| inexplicability | 31 | - | - |
| inexpugnability | 30 | - | - |
| inextensibility | 27 | - | - |
| inextricability | 29 | - | - |
| infallibilities | 20 | - | - |
| infantilisation | 18 | - | - |
| inexcusableness | 26 | - | - |
| inevitabilities | 20 | - | - |
| ineffectualness | 23 | lacking the power to be effective | - |
| inefficaciously | 28 | in an ineffective manner | - |
| ineligibilities | 18 | - | - |
| ineludibilities | 18 | - | - |
| inequitableness | 26 | - | - |
| ineradicability | 23 | - | - |
| inerrablenesses | 17 | - | - |
| inestimableness | 19 | - | - |
| infantilization | 27 | - | - |
| indiscretionary | 21 | - | - |
| inconveniencies | 22 | - | - |
| incoordinations | 18 | - | - |
| incorrectnesses | 19 | - | - |
| incorrigibility | 23 | - | - |
| incorruptnesses | 19 | - | - |
| incredibilities | 20 | - | - |
| incredulousness | 18 | - | - |
| inconsolability | 22 | - | - |
| incomputability | 26 | - | - |
| incongruousness | 18 | the quality of disagreeing; being unsuitable and inappropriate | - |
| inconsecutively | 25 | - | - |
| inconsideration | 18 | the quality of failing to be considerate of others | - |
| inconsistencies | 19 | - | - |
| incrementalisms | 21 | - | - |
| incrementalists | 19 | - | - |
| incrossbreeding | 21 | - | - |
| indeterminately | 21 | - | - |
| indetermination | 18 | the quality of being vague and poorly defined | - |
| indeterministic | 20 | - | - |
| indifferentisms | 24 | - | - |
| indifferentists | 22 | - | - |
| indigenisations | 17 | - | - |
| indigenizations | 26 | - | - |
| indigestibility | 22 | the property of being difficult to digest | - |
| indeterminacies | 20 | - | - |
| indemnification | 23 | a sum of money paid in compensation for loss or injury | - |
| inculpabilities | 21 | - | - |
| incurablenesses | 19 | - | - |
| incuriousnesses | 17 | - | - |
| indefeasibility | 24 | - | - |
| indefectibility | 26 | - | - |
| indefensibility | 24 | - | - |
| indefinableness | 21 | - | - |
| indeliblenesses | 18 | - | - |
| indisciplinable | 22 | - | - |
| immunomodulator | 22 | - | - |
| illegalisations | 16 | - | - |
| immaterialising | 20 | - | - |
| immaterialities | 19 | - | - |
| immaterializing | 29 | - | - |
| immeasurability | 24 | - | - |
| immediatenesses | 20 | - | - |
| immedicableness | 24 | - | - |
| immensurability | 24 | - | - |
| immiscibilities | 23 | - | - |
| imitativenesses | 20 | - | - |
| imaginativeness | 21 | the formation of a mental image of something that is not perceived as real and is not present to the senses | - |
| illegalizations | 25 | - | - |
| illegiblenesses | 18 | - | - |
| illegitimations | 18 | - | - |
| illiberalnesses | 17 | - | - |
| illimitableness | 19 | - | - |
| illogicalnesses | 18 | - | - |
| illustriousness | 15 | the property possessed by something or someone of outstanding importance or eminence | - |
| imaginarinesses | 18 | - | - |
| immiserisations | 19 | - | - |
| immiserizations | 28 | - | - |
| immobilisations | 21 | - | - |
| immunocomplexes | 32 | - | - |
| immunodeficient | 25 | incapable of developing an immune response following exposure to an antigen | immunodeficient rodents |
| immunodiagnoses | 21 | - | - |
| immunodiagnosis | 21 | - | - |
| immunodiffusion | 26 | - | - |
| immunogenetical | 22 | - | - |
| immunogenically | 25 | - | - |
| immunoglobulins | 22 | - | - |
| immunocompetent | 25 | capable of developing an immune response following exposure to an antigen | immunocompetent cells |
| immunochemistry | 29 | the field of chemistry concerned with chemical processes in immunology (such as chemical studies of antigens and antibodies) | - |
| immobilizations | 30 | - | - |
| immortalisation | 19 | - | - |
| immortalization | 28 | - | - |
| immovablenesses | 24 | - | - |
| immoveabilities | 24 | - | - |
| immunoassayable | 24 | - | - |
| immunoassayists | 22 | - | - |
| immunoblottings | 22 | - | - |
| immunologically | 25 | from the point of view of immunology | - |
| ignominiousness | 18 | unworthiness meriting public disgrace and dishonor | - |
| icositetrahedra | 21 | - | - |
| identicalnesses | 18 | - | - |
| identifications | 21 | - | - |
| ideographically | 27 | in an idiographic manner | it's written ideographically |
| idiomaticalness | 20 | - | - |
| idiomaticnesses | 20 | - | - |
| idiomorphically | 28 | - | - |
| idiosyncratical | 23 | - | - |
| ichthyosauruses | 26 | - | - |
| ichthyosaurians | 26 | - | - |
| iatrogenicities | 18 | - | - |
| ichthyodorulite | 27 | - | - |
| ichthyodorylite | 30 | - | - |
| ichthyophagists | 32 | - | - |
| idioticalnesses | 18 | - | - |
| intrapopulation | 19 | - | - |
| intuitivenesses | 18 | - | - |
| intussuscepting | 20 | - | - |
| intussusception | 19 | the folding in of an outer layer so as to form a pocket in the surface | - |
| intussusceptive | 22 | - | - |
| invariabilities | 20 | - | - |
| invectivenesses | 23 | - | - |
| invendibilities | 21 | - | - |
| inventivenesses | 21 | - | - |
| intuitionalists | 15 | - | - |
| intuitionalisms | 17 | - | - |
| intrapreneurial | 17 | - | - |
| intravascularly | 23 | - | - |
| intricatenesses | 17 | - | - |
| intrinsicalness | 17 | - | - |
| introspectional | 19 | - | - |
| introspectively | 25 | - | - |
| introsusception | 19 | - | - |
| intrusivenesses | 18 | - | - |
| invertibilities | 20 | - | - |
| investigational | 19 | - | - |
| invidiousnesses | 19 | - | - |
| irrationalities | 15 | - | - |
| irrationalizing | 25 | - | - |
| irreciprocities | 21 | - | - |
| irreconcilables | 21 | - | - |
| irreconcilement | 21 | - | - |
| irredeemability | 23 | - | - |
| irreducibleness | 20 | - | - |
| irreductibility | 23 | - | - |
| irrationalistic | 17 | - | - |
| irrationalising | 16 | - | - |
| invincibilities | 22 | - | - |
| inviolabilities | 20 | - | - |
| inviolatenesses | 18 | - | - |
| invisiblenesses | 20 | - | - |
| involuntariness | 18 | the trait of being unwilling | in spite of our warnings he plowed ahead with the involuntariness of an automaton |
| ionospherically | 25 | - | - |
| irasciblenesses | 19 | - | - |
| irreformability | 25 | - | - |
| intraperitoneal | 17 | - | - |
| interpretations | 17 | - | - |
| interscholastic | 22 | used of competition or cooperation between secondary schools | - |
| intersexualisms | 24 | - | - |
| interstratified | 19 | - | - |
| interstratifies | 18 | - | - |
| intersubjective | 29 | - | - |
| intertanglement | 18 | - | - |
| intertentacular | 17 | - | - |
| intertextuality | 25 | - | - |
| interrogatorily | 19 | - | - |
| interpretership | 22 | - | - |
| interpretresses | 17 | - | - |
| interprovincial | 22 | - | - |
| interpunctuated | 20 | - | - |
| interpunctuates | 19 | - | - |
| interrogatingly | 20 | - | - |
| interrogational | 16 | - | - |
| intertwinements | 20 | - | - |
| intertwistingly | 22 | - | - |
| interuniversity | 21 | - | - |
| intradermically | 23 | - | - |
| intrafascicular | 22 | - | - |
| intramuscularly | 22 | in an intramuscular way | administer the drug intramuscularly |
| intransigeances | 18 | - | - |
| intransigeantly | 19 | - | - |
| intransigencies | 18 | - | - |
| intransigentism | 18 | - | - |
| intransigentist | 16 | - | - |
| intractableness | 19 | the trait of being hard to influence or control | - |
| intracerebrally | 22 | - | - |
| intervalometers | 20 | - | - |
| intervisibility | 23 | - | - |
| intervisitation | 18 | - | - |
| interweavements | 23 | - | - |
| intolerableness | 17 | - | - |
| intracellularly | 20 | - | - |
| intransmissible | 19 | - | - |
| irrefragability | 24 | - | - |
| irretentiveness | 18 | - | - |
| irreversibility | 23 | the quality of being irreversible (once done it cannot be changed) | - |
| irrevocableness | 22 | - | - |
| irritablenesses | 17 | - | - |
| ismaticalnesses | 19 | - | - |
| isoimmunisation | 19 | - | - |
| isoimmunization | 28 | - | - |
| isoperimetrical | 21 | - | - |
| irresolvability | 23 | - | - |
| irresistibility | 20 | the quality of being overpowering and impossible to resist | - |
| irrefutableness | 20 | - | - |
| irreligiousness | 16 | the quality of not being devout | - |
| irremissibility | 22 | - | - |
| irremovableness | 22 | - | - |
| irreparableness | 19 | - | - |
| irrepealability | 22 | - | - |
| irreprehensible | 22 | - | - |
| irreprehensibly | 25 | - | - |
| iterativenesses | 18 | - | - |
| interpopulation | 19 | - | - |
| inquisitorially | 27 | - | - |
| insignificances | 23 | - | - |
| insignificantly | 24 | not to a significant degree or amount | our budget will only be insignificantly affected by these new cuts |
| insignificative | 24 | - | - |
| insociabilities | 19 | - | - |
| insolublenesses | 17 | - | - |
| insolvabilities | 20 | - | - |
| inspirationally | 20 | with inspiration; in an inspiring manner | he talked inspirationally |
| inspirationisms | 19 | - | - |
| insidiousnesses | 16 | - | - |
| inseparableness | 19 | - | - |
| insatiabilities | 17 | - | - |
| insatiatenesses | 15 | - | - |
| inscribableness | 21 | - | - |
| inscrutableness | 19 | - | - |
| insensatenesses | 15 | - | - |
| insensibilities | 17 | - | - |
| insensitiveness | 18 | the inability to respond to affective changes in your interpersonal environment | - |
| insensitivities | 18 | - | - |
| inspirationists | 17 | - | - |
| instantaneities | 15 | - | - |
| insubstantially | 20 | not substantially; lacking substantial expression or fullness | - |
| insufficiencies | 25 | - | - |
| insuperableness | 19 | - | - |
| insurrectionary | 20 | of or relating to or given to insurrection | - |
| insurrectionism | 19 | the principle of revolt against constituted authority | - |
| insurrectionist | 17 | a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions) | - |
| intangibilities | 18 | - | - |
| integrabilities | 18 | - | - |
| insubordinately | 21 | - | - |
| instinctivities | 20 | - | - |
| institutionally | 18 | by an institution | institutionally controlled |
| instructiveness | 20 | - | - |
| instructorships | 22 | - | - |
| instrumentalism | 19 | a system of pragmatic philosophy that considers idea to be instruments that should guide our actions and their value is measured by their success | - |
| integrationists | 16 | - | - |
| infeasibilities | 20 | - | - |
| infrastructures | 20 | - | - |
| infundibuliform | 26 | - | - |
| infusiblenesses | 20 | - | - |
| ingeniousnesses | 16 | - | - |
| ingenuousnesses | 16 | - | - |
| ingrainednesses | 17 | - | - |
| inharmonicities | 22 | - | - |
| inheritableness | 20 | - | - |
| infrastructural | 20 | - | - |
| infrangibleness | 21 | - | - |
| infectivenesses | 23 | - | - |
| inflammableness | 24 | - | - |
| inflectednesses | 21 | - | - |
| inflexibilities | 27 | - | - |
| informationally | 23 | - | - |
| informativeness | 23 | - | - |
| infralapsarians | 20 | - | - |
| inhomogeneities | 21 | - | - |
| inhospitalities | 20 | - | - |
| inimitabilities | 19 | - | - |
| inoffensiveness | 24 | - | - |
| inofficiousness | 23 | - | - |
| inoperabilities | 19 | - | - |
| inoperativeness | 20 | - | - |
| inopportuneness | 19 | the quality of occurring at an inconvenient time | - |
| inopportunities | 19 | - | - |
| inorganisations | 16 | - | - |
| inorganizations | 25 | - | - |
| inodorousnesses | 16 | - | - |
| inoculabilities | 19 | - | - |
| initialisations | 15 | - | - |
| initializations | 24 | - | - |
| injudiciousness | 25 | the trait of being injudicious | - |
| injuriousnesses | 22 | - | - |
| innocuousnesses | 17 | - | - |
| innoxiousnesses | 22 | - | - |
| innumerableness | 19 | a number beyond counting | - |
| inobtrusiveness | 20 | - | - |
| inquisitionists | 24 | - | - |
| interestingness | 16 | the power of attracting or holding one's attention (because it is unusual or exciting etc.) | - |
| interjaculating | 25 | - | - |
| interjaculatory | 27 | - | - |
| interjectionary | 27 | - | - |
| interlacustrine | 17 | - | - |
| interlaminating | 18 | - | - |
| interlamination | 17 | - | - |
| interlineations | 15 | - | - |
| interlocutorily | 20 | - | - |
| interiorization | 24 | - | - |
| interiorisation | 15 | - | - |
| interfascicular | 22 | - | - |
| interferometers | 20 | - | - |
| interferometric | 22 | - | - |
| interfraternity | 21 | - | - |
| intergeneration | 16 | - | - |
| intergradations | 17 | - | - |
| interindividual | 20 | - | - |
| interinfluences | 20 | - | - |
| interlocutrices | 19 | - | - |
| interlocutrixes | 24 | - | - |
| intermediations | 18 | - | - |
| interparoxysmal | 29 | - | - |
| interpellations | 17 | - | - |
| interpenetrable | 19 | - | - |
| interpenetrated | 18 | - | - |
| interpenetrates | 17 | - | - |
| interperceptual | 21 | - | - |
| interpermeating | 20 | - | - |
| interpersonally | 20 | - | - |
| interosculation | 17 | - | - |
| interosculating | 18 | - | - |
| intermigrations | 18 | - | - |
| interminability | 22 | - | - |
| intermittencies | 19 | - | - |
| intermodulation | 18 | - | - |
| internalisation | 15 | learning (of values or attitudes etc.) that is incorporated within yourself | - |
| internalization | 24 | learning (of values or attitudes etc.) that is incorporated within yourself | - |
| internucleotide | 18 | - | - |
| interphalangeal | 21 | - | - |
| interelectronic | 19 | - | - |
| intellectualise | 17 | - | - |
| interactionisms | 19 | - | - |
| interactionists | 17 | - | - |
| interactivities | 20 | - | - |
| interambulacral | 21 | - | - |
| interambulacrum | 23 | - | - |
| interanimations | 17 | - | - |
| interbehavioral | 23 | - | - |
| intensivenesses | 18 | - | - |
| intellectualist | 17 | - | - |
| intelligentsias | 16 | - | - |
| intelligentzias | 25 | - | - |
| intelligibility | 21 | the quality of language that is comprehensible | - |
| intemperateness | 19 | excess in action and immoderate indulgence of bodily appetites, especially in passion or indulgence | - |
| interchangeably | 26 | in an interchangeable manner | these terms can be used interchangeably |
| interchangement | 23 | - | - |
| interclavicular | 22 | - | - |
| intercorrelated | 18 | - | - |
| intercorrelates | 17 | - | - |
| interculturally | 20 | - | - |
| interdiffusions | 22 | - | - |
| interdigitating | 18 | - | - |
| interdigitation | 17 | - | - |
| interconverting | 21 | - | - |
| interconversion | 20 | - | - |
