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There are 13 twelve-letter words containing I, 2M, O, R, S, T and U

AUTOMORPHISMautomorphism n. (Algebra) An isomorphism of a mathematical object or system of objects onto itself.
automorphism n. The ascription to others of one’s own characteristics.
AUTOMORPHISM n. ascription to others of one's own characteristics.
CREMATORIUMScrematoriums n. Plural of crematorium.
CREMATORIUM n. a place where bodies are cremated, also CREMATORY.
GYMNATORIUMSgymnatoriums n. Plural of gymnatorium.
HARMONIUMISTharmoniumist n. Someone who plays a harmonium.
HARMONIUMIST n. one who plays the harmonium.
LITHOSPERMUMlithospermum n. (Botany) Any plant of the genus Lithospermum.
Lithospermum prop.n. A taxonomic genus within the family Boraginaceae – the stoneseeds and gromwells.
LITHOSPERMUM n. a kind of flower.
MESOGASTRIUMmesogastrium n. (Anatomy) The part of the embryonic mesentery that includes the stomach.
MESOGASTRIUM n. the mesentery supporting the embryonic stomach.
MESOTHORIUMSmesothoriums n. Plural of mesothorium.
MESOTHORIUM n. an old name for either of two radioactive elements.
MICROSTOMOUSMICROSTOMOUS adj. having an unusually small mouth, also MICROSTOMATOUS.
MURMURATIONSmurmurations n. Plural of murmuration.
MURMURATION n. murmuring.
MUSHROOMIESTMUSHROOMY adj. of or like a mushroom.
RUMGUMPTIONSRUMGUMPTION n. (Scots) common sense, also RUMBLEGUMPTION, RUMELGUMPTION, RUMLEGUMPTION, RUMMELGUMPTION, RUMMLEGUMPTION.
TAUTOMERISMStautomerisms n. Plural of tautomerism.
TAUTOMERISM n. possession of more than one structure by a substance.
TRIDOMINIUMStridominiums n. Plural of tridominium.
TRIDOMINIUM n. (Latin) threefold rule.

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.

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See this list for:

  • English Wiktionary: 54 words
  • Scrabble in French: 12 words
  • Scrabble in Spanish: 43 words
  • Scrabble in Italian: 81 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 13 words


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