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List of 15-letter words containing

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There are 8 fifteen-letter words containing I, N, O, P, R and 2Y

HYDROXYPROLINEShydroxyprolines n. Plural of hydroxyproline.
HYDROXYPROLINE n. an amino acid.
HYPOCRYSTALLINEhypocrystalline adj. (Geology, of igneous rocks) having both glass and crystalline components.
HYPOCRYSTALLINE adj. of igneous rocks, having both glass and crystalline components.
NEUROHYPOPHYSISneurohypophysis n. (Anatomy) The posterior lobe of the pituitary gland, responsible for the release of oxytocin and antidiuretic…
NEUROHYPOPHYSIS n. the portion of the pituitary gland that is composed of the infundibulum and posterior lobe and is concerned with the secretion of various hormones.
NEUROPHYSIOLOGYneurophysiology n. (Physiology, neuroscience) The branch of physiology that deals with the nervous system.
NEUROPHYSIOLOGY n. the physiology of the nervous system.
NEUROPSYCHIATRYneuropsychiatry n. (Medicine) The branch of medicine dealing with disorders that have both neurological and psychiatric features.
NEUROPSYCHIATRY n. a branch of medicine concerned with both neurology and psychiatry.
ONYCHOCRYPTOSISonychocryptosis n. (Medicine) ingrowing toenail.
ONYCHOCRYPTOSIS n. the condition of having an ingrowing toenail.
POLYCRYSTALLINEpolycrystalline adj. Composed of an aggregate of very small crystals in random orientations.
POLYCRYSTALLINE adj. consisting of crystals variously oriented.
PYROTECHNICALLYpyrotechnically adv. By means of pyrotechnics.
PYROTECHNICAL adv. relating to pyrotechnics, the art of making fireworks, also PYROTECHNIC.

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


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