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There are 11 fifteen-letter words containing A, E, 3O, S, T and U

CHEMOAUTOTROPHSchemoautotrophs n. Plural of chemoautotroph.
CHEMOAUTOTROPH n. any organism, e.g. bacteria, that produces energy by the oxidation of inorganic compounds, such as iron, ammonia and hydrogen sulphide, also CHEMOAUTROPH.
CONTEMPORANEOUScontemporaneous adj. Existing or created in the same period of time.
CONTEMPORANEOUS adj. existing, occurring, or originating during the same time, also COTEMPORANEOUS.
COUNTERPROPOSALcounterproposal n. A proposal made as an alternative to another, earlier proposal.
counter-proposal n. Alternative form of counterproposal.
COUNTERPROPOSAL n. a return proposal made by one who has rejected a proposal.
DECOLOURISATIONdecolourisation n. Alternative spelling of decolorization.
DECOLOURISATION n. the process of decolourising, also DECOLORISATION, DECOLORIZATION, DECOLOURIZATION.
ENANTIOMORPHOUSenantiomorphous adj. Of or pertaining to enantiomorphs or enantiomorphism; enantiomorphic.
ENANTIOMORPHOUS adj. of or like an enantiomorph, also ENANTIOMORPHIC.
ENCHONDROMATOUSenchondromatous adj. Relating to enchondroma.
ENCHONDROMATOUS adj. of or like an enchondroma, an abnormal cartilaginous growth.
FLUOROPHOSPHATEfluorophosphate n. (Inorganic chemistry) The anion PO3F2- formed by replacing one hydroxyl of a phosphate anion with a…
fluorophosphate n. (Organic chemistry) The functional group >PO3F formed by replacing one hydroxyl of a phosphate group…
FLUOROPHOSPHATE n. a mineral compound of fluorine and phosphorus.
MACROEVOLUTIONSmacroevolutions n. Plural of macroevolution.
MACROEVOLUTION n. evolution that results in relatively large and complex changes, as in species formation.
OSMOREGULATIONSosmoregulations n. Plural of osmoregulation.
OSMOREGULATION n. regulation of osmotic pressure esp. in the body of a living organism.
OVERPOPULATIONSoverpopulations n. Plural of overpopulation.
OVERPOPULATION n. population so dense as to cause environmental deterioration.
PSEUDOCOELOMATEpseudocoelomate adj. Of, pertaining to, or possessing a pseudocoel.
pseudocoelomate n. Such an animal.
PSEUDOCOELOMATE n. an invertebrate (as a nematode or rotifer) having a body cavity that is a pseudocoel.

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: 109 words
  • Scrabble in French: 17 words
  • Scrabble in Spanish: 8 words
  • Scrabble in Italian: 28 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 26 words


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