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There are 85 eighteen-letter words containing 2I, S and 4T

antiadaptationistsanticonstitutionalantifrustrationistantiosteoarthriticantirestrictionistantistructuralistsantitraditionalistantitransportationaphthous␣stomatitisat␣this␣moment␣in␣timeattitude␣indicatorschestnut-bellied␣titChittagong␣Districtcommutation␣ticketsconstitutionalistsconstitutional␣typecontest␣competitioncredit␣institutionsextrainstitutionalgetting␣to␣first␣baseindeterminate␣stateinput-output␣sectioninstitutionalitiesintegration␣testingintensive␣treatmentinterinstitutionalinterpretationistsintersubstitutableintersubstitutionsintrainstitutionalintromittent␣organslegitimate␣interestlegitimate␣theaterslittle␣spotted␣kiwismental␣institutionsmetaconstitutionalmultisubstitutionsnicotine␣stomatitisnitrilotriacetatesorthosubstitutionsparticle␣statisticsphotosubstitutionspostconstitutionalpoststratificationposttribulationistpotentiostaticallyreconstitutabilityrestitutive␣fantasyrootinest␣tootinest rootin'est␣tootin'estspits␣straight␣factssplitting␣the␣sheetsstatisticalizationsticking␣it␣to␣the␣mansticking␣to␣one's␣textstrict␣constructionstring␣substitutionsubstitutabilitiessynthetic␣lethalitytakes␣the␣initiativetarget␣rating␣pointstell␣it␣to␣the␣marinestend␣to␣one's␣knitting 'tend␣to␣one's␣knittingtetratricopeptidesthistle␣butterfliestin-pot␣dictatorshiptitular␣of␣the␣tithestoast␣notificationstourist␣attractionstourist␣destinationtraditional␣studenttransaction␣utilitytransit␣instrumentstransition␣altitudetransubstantiatingtransubstantiationtransubstantiativeTsuji-Trost␣reactiontubulointerstitialtubulointerstitiumultraintuitionistsunsubstitutabilityuntransmittabilityVincent's␣stomatitis

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 88 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: 13 words
  • German Wiktionary: 71 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 28 words

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