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There are 18 fifteen-letter words containing E, H, L, N, 2O, P and Y

AEROHYDROPLANESAEROHYDROPLANE n. a winged hydroplane or flying-boat.
EPICHLOROHYDRINepichlorohydrin n. (Chemistry) Any epihalohydrin in which the halogen is chlorine.
EPICHLOROHYDRIN n. a volatile liquid toxic epoxide used esp. in making epoxy resins and rubbers.
HYDROXYPROLINEShydroxyprolines n. Plural of hydroxyproline.
HYDROXYPROLINE n. an amino acid.
HYPERINVOLUTIONHYPERINVOLUTION n. extreme involution.
HYPERSOMNOLENCEhypersomnolence n. (Medicine) Excessive sleepiness.
HYPERSOMNOLENCE n. the state of being excessively sleepy.
HYPOVENTILATIONhypoventilation n. (Medicine) Respiratory depression, occurring when ventilation is inadequate to perform the necessary…
HYPOVENTILATION n. abnormally decreased speed and depth of breathing.
IONOSPHERICALLYionospherically adv. In terms of the ionosphere.
IONOSPHERIC adv. relating to the ionosphere.
LYMPHOADENOMATALYMPHOADENOMA n. a tumour of the lymph glands, aka Hodgkin's disease.
LYMPHOCYTOPENIAlymphocytopenia n. (Pathology) An abnormally low level of lymphocytes in the blood.
LYMPHOCYTOPENIA n. an abnormally low level of lymphocytes in the blood.
NEUROPHYSIOLOGYneurophysiology n. (Physiology, neuroscience) The branch of physiology that deals with the nervous system.
NEUROPHYSIOLOGY n. the physiology of the nervous system.
NEUROPSYCHOLOGYneuropsychology n. A branch of neurology and of clinical psychology that investigates the physiological basis of psychological processes.
neuropsychology n. The facts uncovered thereby, or the body of knowledge thus produced.
NEUROPSYCHOLOGY n. the study of the relation between brain and behaviour.
PALAEOETHNOLOGYpalaeoethnology n. Alternative form of paleoethnology.
PALAEOETHNOLOGY n. the science of early man.
PALAEONTOGRAPHYpalaeontography n. The description of fossil remains in scientific literature.
palaeontography n. The representation of forms of life represented by fossil remains.
PALAEONTOGRAPHY n. descriptive palaeontology, the description of fossil remains.
PHRENOLOGICALLYphrenologically adv. In terms of phrenology.
PHRENOLOGICAL adv. relating to phrenology, also PHRENOLOGIC.
POLYCHLORINATEDpolychlorinated adj. (Chemistry) Having many hydrogen atoms replaced by chlorine.
POLYCHLORINATED adj. as in polychlorinated biphenyl.
POLYCHLOROPRENEpolychloroprene n. (Organic chemistry) A polymer of chloroprene.
POLYCHLOROPRENE n. neoprene.
POLYPHLOESBOEANpolyphloesboean adj. (Poetic) Loudly roaring; used to describe the ocean.
POLYPHLOESBOEAN adj. loud-roaring, also POLYPHLOISBIC.
XENOMORPHICALLYXENOMORPHIC adv. having a form not its own.

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: 188 words
  • Scrabble in French: 12 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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