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There are 19 thirteen-letter words containing A, E, H, 2O, P, S and Y

CHLAMYDOSPOREchlamydospore n. A thick-walled spore that is the resting stage of some bacteria.
CHLAMYDOSPORE n. a thick-walled usually resting fungal spore.
ESOPHAGOSCOPYesophagoscopy n. (American spelling, medicine) Diagnostic inspection of the interior of the esophagus.
ESOPHAGOSCOPY n. examination of the oesophagus, also OESOPHAGOSCOPY.
HYPERBOLAEONSHYPERBOLAEON n. a term in in Greek prosody.
HYPOPHOSPHATEhypophosphate n. (Inorganic chemistry) The oxyanion of phosphorus P2O64- derived from hypophosphoric acid; any salt containing…
HYPOPHOSPHATE n. any salt or ester of hypophosphoric acid.
HYPOTHECATORShypothecators n. Plural of hypothecator.
HYPOTHECATOR n. one who hypothecates.
LYMPHOMATOSESlymphomatoses n. Plural of lymphomatosis.
LYMPHOMATOSIS n. the presence of multiple lymphomas in the body.
MYCETOPHAGOUSmycetophagous adj. That feeds on fungi.
MYCETOPHAGOUS adj. eating fungi.
NARCOHYPNOSESNARCOHYPNOSIS n. the use of narcotics to produce hypnosis.
ONYCHOPHAGIESONYCHOPHAGY n. the habit of biting one's fingernails.
ORCHESOGRAPHYorchesography n. An enhanced form of choreography that includes details of the music to accompany the dance.
ORCHESOGRAPHY n. notation of dancing.
PHARYNGOSCOPEpharyngoscope n. An instrument used to examine the pharynx.
PHARYNGOSCOPE n. an instrument for inspecting the pharynx.
PHOSPHORYLASEphosphorylase n. (Biochemistry) Any enzyme that catalyzes the production of glucose phosphate from glycogen and inorganic phosphate.
PHOSPHORYLASE n. any of the enzymes that catalyze phosphorolysis with the formation of organic phosphates.
PHOSPHORYLATEphosphorylate v. (Transitive) to cause phosphorylation.
phosphorylate v. (Intransitive) to undergo phosphorylation.
PHOSPHORYLATE v. to cause (an organic compound) to take up or combine with phosphoric acid or a phosphorus-containing group.
PHOTOSYNTHATEphotosynthate n. (Biochemistry) Any compound that is a product of photosynthesis.
PHOTOSYNTHATE n. a product of photosynthesis.
PHYTONADIONESPHYTONADIONE n. phylloquinone, vitamin K1.
POLYADELPHOUSpolyadelphous adj. (Botany) Having stamens combined in more than two groups.
POLYADELPHOUS adj. of stamens, united in several bundles; having the stamens so united.
PYROCATECHOLSpyrocatechols n. Plural of pyrocatechol.
PYROCATECHOL n. another name for catechol, also PYROCATECHIN.
PYROPHOSPHATEpyrophosphate n. (Inorganic chemistry) Any salt or ester of pyrophosphoric acid.
PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid.
RHYTHMOPOEIASRHYTHMOPOEIA n. the art of composing rhythmically.

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: 98 words
  • Scrabble in French: 19 words
  • Scrabble in Spanish: 1 word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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