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There are 138 twenty-one-letter words containing I, K, O and 2R

a␣barking␣dog␣never␣bitesalkylhydroperoxidasesAmerican␣cocker␣spanielAnkole␣African␣mole-ratsarteries␣of␣AdamkiewiczAtlantic␣horse␣mackerelAustralian␣as␣a␣kangarooAx-Grothendieck␣theoremback␣to␣the␣drawing␣boardbank-and-turn␣indicatorsbarking␣at␣the␣wrong␣treebarking␣up␣the␣wrong␣treeBerk-Tabatznik␣syndromeBjelovarsko-bilogorskablack␣over␣Bill's␣mother'sblue-winged␣kookaburrasbrachiocephalic␣trunksbreaking␣someone's␣heartbreaking␣the␣fourth␣wallBroken␣Glass␣RepublicanBruton's␣tyrosine␣kinaseCentral␣Asian␣Ovcharkascheckerboard␣renderingchronopharmacokineticcockpit␣voice␣recorderscommon␣squirrel␣monkeysCoxeter-Dynkin␣diagramsdaggertooth␣pike␣congerdark␣crimson␣underwingsdig␣one's␣grave␣with␣a␣forkdisembarkment␣syndromedrive␣one's␣pigs␣to␣marketdropping␣like␣a␣hot␣brickDunning-Kruger␣syndromeEast␣Riding␣of␣YorkshireEdgeworth-Kuiper␣objectelectroshock␣therapieselevating␣work␣platformerrors␣of␣the␣second␣kinderythroleukemogenesiserythromegakaryocyticfall␣off␣the␣turnip␣truckfell␣off␣the␣turnip␣truckfingers␣in␣the␣cookie␣jarforeign␣exchange␣marketFrankenstein's␣monstersGreat␣American␣Songbookgreat␣brown␣kingfishersgreen-backed␣firecrownsGrothendieck␣universeshistory␣of␣the␣four␣kingsInterior␣Alaskan␣wolvesinverted␣question␣marksivory-billed␣woodpeckerKarl␣Fischer␣titrationsKenya␣Revenue␣Authoritykept␣it␣on␣the␣barber␣poleKernighan-Lin␣algorithmkidnapped␣robot␣problemkinetofragminophoransKingdom␣of␣Great␣BritainKirchhoff's␣circuit␣lawsKirkton␣of␣Auchterhousekitchen␣sink␣regressionknight␣in␣shining␣armourknights␣in␣shining␣armorKoprivničko-križevačkaKoyraboro␣Senni␣SonghaiKyasanur␣forest␣diseaseleukoerythroblastosislike␣a␣martin␣to␣his␣gourdlike␣a␣martin␣to␣its␣gourdlike␣there␣is␣no␣tomorrowlittle␣black␣cormorantsLotka-Volterra␣equationmakes␣someone's␣hair␣curlmake␣this␣world␣go␣aroundmetal-organic␣frameworkmeter-kilogramme-secondmetre-kilogramme-secondmouse-colored␣antshrikenetwork␣interface␣cardsNeukirch-Uchida␣theoremneuropharmacokineticsnon-baryonic␣dark␣matternondiversifiable␣risks non-diversifiable␣risksnon-maskable␣interruptsNorfolk␣Island␣star␣pinenortheastern␣water␣tickNorth␣Island␣brown␣kiwisnot␣worth␣a␣tinker's␣cursenuclear-electric␣rocketoak␣processionary␣mothsout-paramouring␣the␣TurkParkinson-plus␣syndromepissing␣like␣a␣racehorsepiss␣more␣than␣one␣drinksPotter-Bucky␣diaphragmspressure␣makes␣diamondsprogrammed␣function␣keypublic-key␣cryptography public␣key␣cryptographyput␣a␣spanner␣in␣the␣worksRajah␣Brooke's␣birdwings

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 35 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: 1 word
  • German Wiktionary: 352 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 212 words

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