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There are 18 twelve-letter words containing A, C, I, M, 2O, S and U

AMPHICOELOUSamphicoelous adj. (Zoology, of vertebrae) Having both ends concave; biconcave.
AMPHICOELOUS adj. of the vertebrae of most fishes and some amphibians, concave at the anterior and posterior ends.
BROMOURACILSbromouracils n. Plural of bromouracil.
BROMOURACIL n. a uracil derivative that is an analog of thymine and pairs readily with adenine and sometimes with guanine.
CLADOSPORIUMCladosporium prop.n. A taxonomic genus within the family Davidiellaceae – fungi including some of the most common indoor…
CLADOSPORIUM n. a type of fungus.
COMMUTATIONScommutations n. Plural of commutation.
COMMUTATION n. the exchange of the death sentence for a less severe punishment.
COMPUTATIONScomputations n. Plural of computation.
COMPUTATION n. the act or action of computing.
CONSUMMATIONconsummation n. The act of consummating, or the state of being consummated; the state of being completed; completion.
consummation n. The first act of sexual intercourse in a relationship, particularly the first such act following marriage.
consummation n. The achievement of perfection.
CONTUMACIOUScontumacious adj. Contemptuous of authority; willfully disobedient; rebellious.
contumacious adj. (Law) Willfully disobedient to the summons or orders of a court.
CONTUMACIOUS adj. stubbornly disobedient, rebellious.
COSMONAUTICScosmonautics n. The activities of cosmonauts; Soviet/Russian astronautics.
COSMONAUTICS n. Russian astronautics.
DIATOMACEOUSdiatomaceous adj. Of, pertaining to, or containing diatoms or their coverings.
DIATOMACEOUS adj. consisting of or abounding in diatoms or their siliceous remains.
MALOCCLUSIONmalocclusion n. (Dentistry) A misalignment of the upper and lower sets of teeth.
MALOCCLUSION n. faulty contact between the upper and lower teeth when the jaw is closed.
MATROCLINOUSmatroclinous adj. Having mostly maternally inherited characteristics.
MATROCLINOUS adj. inherited from the mother; more like the mother than the father, also MATRICLINIC, MATRICLINOUS, MATROCLINAL, MATROCLINIC.
MICROPHAGOUSmicrophagous adj. (Zoology) Feeding on small particles.
MICROPHAGOUS adj. of an animal, feeding on small particles of food.
MOLLUSCOIDALmolluscoidal adj. Molluscoid.
MOLLUSCOIDAL adj. like a mollusc.
MORDACIOUSLYmordaciously adv. In a mordacious manner.
MORDACIOUS adv. given to biting; biting in quality.
MOUSTACHIOEDmoustachioed adj. (Of a man or his face) Possessing a moustache or moustachio.
moustachioed v. Simple past tense and past participle of moustachio.
MOUSTACHIOED adj. having a moustachio.
MUCRONATIONSmucronations n. Plural of mucronation.
MUCRONATION n. the state of being mucronate.
MUSEOLOGICALmuseological adj. Pertaining to museology.
MUSEOLOGICAL adj. relating to museology.
NONMALICIOUSnonmalicious adj. Not malicious.
NONMALICIOUS adj. not malicious.

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: 72 words
  • Scrabble in French: 23 words
  • Scrabble in Spanish: 85 words
  • Scrabble in Italian: 108 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 42 words


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