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There are 64 twenty-one-letter words containing I, O, 3P and T

amplitude␣spectroscopyanaphylactoid␣purpurasapologetic␣apostrophesapplication␣programmesappropriate␣technologyCalifornia␣pepper␣treescapnopneumoperitoneumcultural␣appropriationcultural␣appropriatorsculturally␣appropriatecyclohexadepsipeptidecyclooctadepsipeptidediisopropyltryptaminedropped␣like␣a␣hot␣potatoEuropean␣pond␣terrapinsferriprotoporphyrinicfibroepithelial␣polypshyperlipoproteinaemiahyperlipoproteinaemichyperlipoproteinemiashyperphosphorylationshyperpolyploidizationhypoelliptic␣operatorsinositolphospholipidsinterprezygapophysealintraprezygapophysealkidnapped␣robot␣problemlipodepsinonapeptideslipotetradecapeptideslymphoepitheliotropicmercaptopropionic␣acidmotherhood␣and␣apple␣pienucleophosphoproteinspaleopolyploidizationparatopological␣groupsparietotemporopontinepeephole␣optimizationspeptidopolysaccharidephosphopeptidomimeticphotophosphorylationsphotoplethysmographicpoliticophilosophicalpolluter␣pays␣principlepolyphosphoinositidesPortugal␣Cove-St.␣Philip'sprepositional␣pronounsprincipal-agent␣problempropreantepenultimateprosopometamorphopsiapseudoanthropomorphicpseudophosphorylationpsychopathophysiologypublic-key␣cryptography public␣key␣cryptographypurchasing␣power␣parityputting␣lipstick␣on␣a␣pigreciprocity␣principlesrobbing␣Peter␣to␣pay␣Paulsingle-page␣applicationspeculative␣philosophytriphenylphosphoniumstypewriter␣apostrophestypographic␣apostropheupper␣respiratory␣tract

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 39 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 5 words
  • Portuguese Wiktionary: 1 word
  • Dutch Wiktionary: 8 words

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