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List of 12-letter words containing

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There are 5 twelve-letter words containing H, I, M, N, O, U and Y

ERYTHRONIUMSERYTHRONIUM n. any plant of the bulbous genus Erythronium, with decoratively mottled leaves and cyclamen-like flowers.
HARMONIOUSLYharmoniously adv. In a harmonious manner; coordinately.
HARMONIOUS adv. musically concordant.
HYDROXONIUMShydroxoniums n. Plural of hydroxonium.
HYDROXONIUM n. the obsolete name for the cation H3O+ derived from protonation of water.
PERIONYCHIUMPERIONYCHIUM n. tissue surrounding a nail.
THINGUMMYBOBthingummybob n. Alternative form of thingamabob.
THINGUMMYBOB n. a whatsit, also THINGAMY, THINGAMYBOB, THINGAMYJIG, THINGUMABOB, THINGUMAJIG, THINGUMBOB, THINGUMMY, THINGUMMYJIG.

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 1Word.ws and WikWik.org.

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See this list for:

  • English Wiktionary: 26 words
  • Scrabble in French: 5 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: 1 word


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