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There are 14 twelve-letter words containing C, E, 2H, M, O, P and R

ARCHIPHONEMEarchiphoneme n. (Phonology) A unit representing two or more underlying phonemes, where the distinction between them…
ARCHIPHONEME n. an abstract linguistic unit representing two or more phonemes when the distinction between these has been neutralized, conventionally shown by a capital letter within slashes.
CHEMOAUTROPHCHEMOAUTROPH n. any organism, e.g. bacteria, that produces energy by the oxidation of inorganic compounds, such as iron, ammonia and hydrogen sulphide, also CHEMOAUTOTROPH.
CHEMOSPHERESchemospheres n. Plural of chemosphere.
CHEMOSPHERE n. the thermosphere, the outermost layer of the atmosphere.
CHEMOSPHERICCHEMOSPHERIC adj. relating to the chemosphere, the outermost layer of the atmosphere.
CHEMOTHERAPYchemotherapy n. (Medicine) Any chemical treatment intended to be therapeutic with respect to a disease state.
chemotherapy n. (Oncology, most common usage) chemical treatment to kill or halt the replication and/or spread of cancerous…
CHEMOTHERAPY n. therapy involving the use of chemicals.
CHROMOPHOBESchromophobes n. Plural of chromophobe.
CHROMOPHOBE n. a cell that does not take a stain easily.
CHROMOPHORESchromophores n. Plural of chromophore.
CHROMOPHORE n. the group of atoms in a chemical compound responsible for its colour.
CHROMOSPHEREchromosphere n. (Astronomy) The faint pink extension of a star’s atmospheric envelope between the corona and the photosphere.
CHROMOSPHERE n. the region of the atmosphere of a star between the star's photosphere and its corona.
HOMEOMORPHIChomeomorphic adj. Having a homeomorphism.
HOMEOMORPHIC adj. relating to homeomorphism.
HYPSOCHROMESHYPSOCHROME n. a shift to a shorter wavelength in the absorption spectrum of a compound.
PHOTOTHERMICphotothermic adj. Relating to both light and heat.
PHOTOTHERMIC adj. of or concerned with light and heat, esp. the production of heat by light, also PHOTOTHERMAL.
PHYTOCHROMESphytochromes n. Plural of phytochrome.
PHYTOCHROME n. a plant pigment which absorbs red or infrared rays and acts as an enzyme controlling growth.
RHAMPHOTHECArhamphotheca n. A thin horny sheath of keratin on the outer surface of a bird’s beak.
RHAMPHOTHECA n. the horny or leathery outer layer of a bird's bill.
THERMOPHILICthermophilic adj. (Biology) of, or relating to a thermophile; living and thriving at relatively high temperatures.
THERMOPHILIC adj. of plants etc. requiring or thriving in high temperatures, also THERMOPHIL, THERMOPHILE, THERMOPHILOUS.

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: 39 words
  • Scrabble in French: 8 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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