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There are 9 fifteen-letter words containing H, 2L, N, O, P, S and Y

HYPOCRYSTALLINEhypocrystalline adj. (Geology, of igneous rocks) having both glass and crystalline components.
HYPOCRYSTALLINE adj. of igneous rocks, having both glass and crystalline components.
IONOSPHERICALLYionospherically adv. In terms of the ionosphere.
IONOSPHERIC adv. relating to the ionosphere.
LYOPHILISATIONSlyophilisations n. Plural of lyophilisation.
LYOPHILISATION n. freeze-drying, also LYOPHILIZATION.
LYOPHILIZATIONSlyophilizations n. Plural of lyophilization.
LYOPHILIZATION n. freeze-drying, also LYOPHILISATION.
MYELENCEPHALONSMYELENCEPHALON n. the posterior part of the developing vertebrate hindbrain or the corresponding part of the adult brain composed of the medulla oblongata.
POLYPHLOESBOEANpolyphloesboean adj. (Poetic) Loudly roaring; used to describe the ocean.
POLYPHLOESBOEAN adj. loud-roaring, also POLYPHLOISBIC.
POLYSYNTHETICALpolysynthetical adj. Alternative form of polysynthetic.
POLYSYNTHETICAL adj. made up of many separate elements, also POLYSYNTHETIC.
PSYCHOGENICALLYpsychogenically adv. In a psychogenic way.
PSYCHOGENIC adv. derived from the mind.
SYCOPHANTICALLYsycophantically adv. In a sycophantic manner.
SYCOPHANTICAL adv. (obsolete) sycophantic, also SYCOPHANTIC.

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: 64 words
  • Scrabble in French: 5 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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