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There are 14 twelve-letter words containing A, C, E, I, M, O, P 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.
ARCHESPORIUMarchesporium n. (Botany) Any of the cells of the sporangium that give rise to spores.
ARCHESPORIUM n. a primitive cell or group of cells from which a mother cell develops.
CASSIOPEIUMSCASSIOPEIUM n. a former name for lutetium.
COMPULSATIVEcompulsative adj. (Obsolete) compulsatory; employing force or constraint.
COMPULSATIVE adj. (Shakespeare) compulsory, also COMPULSATORY.
DEUTOPLASMICdeutoplasmic adj. (Biology) Pertaining to, or composed of, deutoplasm.
DEUTOPLASMIC adj. of or like deutoplasm, the food material, such as yolk or fat, within an egg or cell.
INCOMPUTABLEincomputable adj. Not computable; that cannot be computed, calculated or estimated.
INCOMPUTABLE adj. not computable.
MICROCAPSULEmicrocapsule n. (Medicine) A very small capsule designed to release its contents when broken (typically, after being swallowed).
MICROCAPSULE n. a tiny capsule containing material (as an adhesive or a medicine) that is released when the capsule is broken.
PARAMOUNCIESPARAMOUNCY n. the state of being paramount, also PARAMOUNTCY.
PERIOSTRACUMperiostracum n. (Malacology) The proteinaceous outer sheath of many molluscan shells.
PERIOSTRACUM n. the horny outer layer of a mollusc's shell.
PLEIOCHASIUMpleiochasium n. (Botany) An inflorescence in which several buds come out at the same time.
PLEIOCHASIUM n. a cymose inflorescence in which each branch bears more than two lateral branches.
PRIMULACEOUSprimulaceous adj. (Botany) Characteristic of the primrose and other plants of the order Primulaceae.
PRIMULACEOUS adj. belonging to the Primula family.
PROMUSCIDATEpromuscidate adj. Having a promuscis.
promuscidate adj. Resembling a promuscis.
PROMUSCIDATE adj. like or having a promuscis.
UNIMPORTANCEunimportance n. Lack of importance.
UNIMPORTANCE n. lack of importance.
UNPROCLAIMEDunproclaimed adj. Not proclaimed; unannounced.
UNPROCLAIMED adj. not proclaimed.

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: 62 words
  • Scrabble in French: 19 words
  • Scrabble in Spanish: 65 words
  • Scrabble in Italian: 34 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 56 words


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