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List of 15-letter words containing

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There are 11 fifteen-letter words containing H, I, O, P, T and X

HYDROXYAPATITEShydroxyapatites n. Plural of hydroxyapatite.
HYDROXYAPATITE n. a complex phosphate of calcium that occurs as a mineral and is the chief structural element of vertebrate bone.
HYDROXYLAPATITEhydroxylapatite n. Alternative spelling of hydroxyapatite.
HYDROXYLAPATITE n. a mineral of the apatite group that is rare in the ground but is the principal inorganic constituent of tooth enamel and bone.
HYPEREXCRETIONSHYPEREXCRETION n. excessive excretion.
HYPEREXTENSIONShyperextensions n. Plural of hyperextension.
HYPEREXTENSION n. the extension of a joint beyond its normal range.
LEXICOGRAPHISTSlexicographists n. Plural of lexicographist.
LEXICOGRAPHIST n. one who makes dictionaries.
PHOTOEXCITATIONphotoexcitation n. (Chemistry) The formation of an excited state by the absorption of a photon.
PHOTOEXCITATION n. the process of exciting the atoms or molecules of a substance by the absorption of radiant energy.
PHOTOOXIDATIONSphotooxidations n. Plural of photooxidation.
PHOTOOXIDATION n. oxidation under the influence of radiant energy, as light.
PHOTOTOXICITIESphototoxicities n. Plural of phototoxicity.
PHOTOTOXICITY n. the state of being phototoxic.
PHYTOTOXICITIESphytotoxicities n. Plural of phytotoxicity.
PHYTOTOXICITY n. the state of being phytotoxic.
PSYCHOSEXUALITYpsychosexuality n. The psychological aspects of sexuality.
PSYCHOSEXUALITY n. the psychic factors of sex.
XYLOTYPOGRAPHICxylotypographic adj. Of or pertaining to xylotypography.
XYLOTYPOGRAPHIC adj. relating to, or printed from, wooden type.

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: 106 words
  • Scrabble in French: 2 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: 2 words


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