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 There are 4 twelve-letter words containing H, O, R, U, X and Y| HYDROXONIUMS | • hydroxoniums n. Plural of hydroxonium. • HYDROXONIUM n. the obsolete name for the cation H3O+ derived from protonation of water.
 |  | HYDROXYUREAS | • hydroxyureas n. Plural of hydroxyurea. • HYDROXYUREA n. a drug used to treat some forms of leukemia, melanoma, and malignant tumors.
 |  | PYRRHULOXIAS | • pyrrhuloxias n. Plural of pyrrhuloxia. • PYRRHULOXIA n. a grey-and-pink crested bunting of Central and SW North America, with a short parrot-like bill.
 |  | UNORTHODOXLY | • unorthodoxly adv. In an unorthodox manner, unconventionally. • UNORTHODOX adv. not orthodox.
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 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.Definitions are short excerpt from the WikWik.org and 1Word.ws.
 
 See this list for:English Wiktionary: 16 wordsScrabble in French: 3 wordsScrabble in Spanish: no wordScrabble in Italian: no wordScrabble in German: no wordScrabble in Romanian: no word
 
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