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There are 11 fifteen-letter words containing H, I, S, X and Y

HETEROSEXUALITYheterosexuality n. The state of being sexually and romantically attracted primarily or exclusively to persons of the opposite sex.
heterosexuality n. Sexual activity with a person of the opposite sex.
HETEROSEXUALITY n. the state of being heterosexual.
HEXYLRESORCINOLhexylresorcinol n. (Organic chemistry) A hexyl derivative of resorcinol that has anaesthetic, antiseptic and antihelmintic properties.
HEXYLRESORCINOL n. a crystalline phenol used as an antiseptic and anthelmintic.
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.
HYDROXYPROLINEShydroxyprolines n. Plural of hydroxyproline.
HYDROXYPROLINE n. an amino acid.
HYPEREXCRETIONSHYPEREXCRETION n. excessive excretion.
HYPEREXTENSIONShyperextensions n. Plural of hyperextension.
HYPEREXTENSION n. the extension of a joint beyond its normal range.
METHYLXANTHINESmethylxanthines n. Plural of methylxanthine.
METHYLXANTHINE n. a methylated xanthine derivative, such as caffeine, theobromine, or theophylline.
OXYHAEMOGLOBINSoxyhaemoglobins n. Plural of oxyhaemoglobin.
OXYHAEMOGLOBIN n. a loose compound of oxygen and haemoglobin, also OXYHEMOGLOBIN.
PEROXYSULPHURICPEROXYSULPHURIC adj. as in peroxysulphuric acid.
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.

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: 99 words
  • Scrabble in French: 3 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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