Found 306 15-letter words starting with I
Highest Scrabble Score
The highest scoring 15-letter word starting with I in Scrabble:
INEXPLICABILITY31 ptsHighest Words With Friends Score
The highest scoring 15-letter word starting with I in WWF:
INEXPLICABILITY36 ptsAbout 15-Letter Words Starting With I
This list contains valid 15-letter words that begin with I. Longer words score higher in Scrabble due to premium tiles and the 50-point bingo bonus. Each word links to its definition page with anagrams and game scores.
15-Letter Words Starting With I
inexplicability31immobilizations30individualizing30immaterializing29immunochemistry29impersonalizing29inextricability29interparoxysmal29intersubjective29immortalization28immunopathology28ineffaceability28inefficaciously28ideographically27imperishability27impoverishments27inexpensiveness27infantilization27inflexibilities27inquisitiveness27inquisitorially27ichthyosaurians26immunodiffusion26inapplicability26incommensurably26incommunicative26incomparability26incompatibility26inconsequential26indefectibility26indigenizations26industrializing26ineffectiveness26inexcusableness26infundibuliform26intellectualize26interchangeably26illegalizations25immunocompetent25immunodeficient25immunologically25impeccabilities25imponderability25injudiciousness25insufficiencies25intertextuality25introspectively25ionospherically25irreformability25immovablenesses24immunoassayable24immunotherapies24impenetrability24imperfectnesses24implicativeness24improvabilities24inaccessibility24inappropriately24incalculability24incomprehension24inconspicuously24indefeasibility24indefensibility24indifferentisms24inexorabilities24inflammableness24initializations24inoffensiveness24insignificantly24interdependency24interiorization24internalization24irrefragability24immiscibilities23impalpabilities23implacabilities23improbabilities23inadmissibility23incommensurable23inconveniencing23incorrigibility23indemnification23ineffablenesses23ineffectualness23ineradicability23infinitesimally23informationally23informativeness23insignificances23interbehavioral23interchangeable23intervisibility23intravascularly23invectivenesses23invulnerability23irreversibility23immunoblottings22immunoglobulins22immunomodulator22impassivenesses22impregnableness22improvisational22improvisatorial22impulsivenesses22inconveniencies22indifferentists22indigestibility22indisciplinable22individualistic22injuriousnesses22instructorships22interdiffusions22interferometric22interprovincial22interrogatively22interscholastic22intracerebrally22intramuscularly22intussusceptive22invincibilities22irrepealability22irrevocableness22identifications21imaginativeness21immunodiagnoses21immunodiagnosis21immutablenesses21impassabilities21impassibilities21impecuniosities21impecuniousness21implementations21impossibilities21imprecisenesses21impressionistic21incapablenesses21incapacitations21inconsiderately21incrementalisms21indefinableness21indeterminately21indissolubility21individualising21inhomogeneities21insubordinately21intelligibility21intercommunions21intercomparison21interconverting21interdependence21interfraternity21interperceptual21interphalangeal21interuniversity21inventivenesses21irreconcilables21idiomaticnesses20imitativenesses20immediatenesses20inclusivenesses20incredibilities20indeterminacies20indeterministic20individualities20indomitableness20indubitableness20ineducabilities20inevitabilities20infallibilities20infeasibilities20infrastructures20infusiblenesses20inheritableness20inhospitalities20inoperativeness20inspirationally20instructiveness20instrumentality20insurrectionary20intellectuality20intensification20interconnecting20interconversion20interculturally20interferometers20interindividual20interinfluences20interpermeating20interpersonally20intertwinements20intervalometers20interventionism20intracellularly20intussuscepting20invariabilities20inviolabilities20invisiblenesses20irresistibility20illimitableness19immaterialities19imperiousnesses19impersonalities19impetuousnesses19importunateness19inconsistencies19incorrectnesses19incorruptnesses19incrementalists19inopportuneness19inscrutableness19inseparableness19insociabilities19instrumentalism19intellectualism19intemperateness19interconnection19interdivisional19interelectronic19intermittencies19interpopulation19interstratified19intransigeantly19intrapopulation19introspectional19intussusception19investigational19invidiousnesses19irasciblenesses19irreparableness19identicalnesses18ignominiousness18illogicalnesses18imaginarinesses18inattentiveness18incongruousness18inconsideration18incoordinations18indetermination18indoctrinations18ineligibilities18insensitiveness18insensitivities18instantaneously18institutionally18insubordination18intangibilities18integrabilities18intensivenesses18intercollegiate18intercorrelated18interdigitating18intermediations18intermodulation18internationally18internucleotide18interpenetrated18interstratifies18interventionist18intervisitation18intransigeances18intrusivenesses18intuitivenesses18inviolatenesses18involuntariness18illiberalnesses17inalterableness17inanimatenesses17incuriousnesses17industrialising17innocuousnesses17insatiabilities17insensibilities17insolublenesses17instrumentalist17instrumentation17insurrectionist17intellectualist17interanimations17intercorrelates17interdigitation17intergradations17interlacustrine17interpellations17interpenetrates17interpretations17intolerableness17intraperitoneal17intrapreneurial17intricatenesses17irrationalistic17irritablenesses17industriousness16ingeniousnesses16ingenuousnesses16insidiousnesses16integrationists16intelligentsias16interestingness16intergeneration16interrogational16interrogatories16illustriousness15insatiatenesses15instantaneities15interlineations15irrationalities15