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

AMINOPHYLLINEaminophylline n. (Pharmacology) A bronchodilator comprising theophylline and ethylenediamine in a 2:1 ratio.
AMINOPHYLLINE n. a drug used to stimulate the heart and to dilate the air passages.
DEHYPNOTISINGdehypnotising v. Present participle of dehypnotise.
DEHYPNOTISE v. to free from hypnosis, also DEHYPNOTIZE.
DEHYPNOTIZINGdehypnotizing v. Present participle of dehypnotize.
DEHYPNOTIZE v. to free from hypnosis, also DEHYPNOTISE.
ENANTIOMORPHYenantiomorphy n. The condition of being enantiomorphic.
ENANTIOMORPHY n. the state of being an enantiomorph, an object which is the mirror image of another.
HYPERFUNCTIONhyperfunction n. (Mathematics) A generalization of a function.
hyperfunction n. (Medicine) Abnormally elevated function.
HYPERFUNCTION n. the overactivity of a gland or other bodily organ.
HYPERTENSIONShypertensions n. Plural of hypertension.
HYPERTENSION n. abnormally or excessively high pressure of arterial blood.
HYPHENISATIONHYPHENISATION n. the process of hyphenising, also HYPHENIZATION.
HYPHENIZATIONhyphenization n. Hyphenation.
HYPHENIZATION n. the process of hyphenizing, also HYPHENISATION.
HYPOXANTHINEShypoxanthines n. Plural of hypoxanthine.
HYPOXANTHINE n. a purine base found in plant and animal tissues that yields xanthine on oxidation.
PERICYNTHIONSpericynthions n. Plural of pericynthion.
PERICYNTHION n. the point at which a spacecraft in lunar orbit is nearest to the moon.
PHENOMENALITYphenomenality n. The state or property of being phenomenal.
PHENOMENALITY n. the state of being phenomenal.
PHYLLOQUINONEphylloquinone n. (Biochemistry, pharmacology) Synonym of phytomenadione.
PHYLLOQUINONE n. vitamin K1, one of the fat-soluble vitamin K group, essential for normal blood coagulation.
PHYTONADIONESPHYTONADIONE n. phylloquinone, vitamin K1.
PHYTONUTRIENTphytonutrient n. Any substance, of plant origin, that provides nutrition; a phytochemical.
REHYPNOTISINGREHYPNOTISE v. to hypnotise again, also REHYPNOTIZE.
REHYPNOTIZINGrehypnotizing v. Present participle of rehypnotize.
REHYPNOTIZE v. to hypnotize again, also REHYPNOTISE.
SPHINGOMYELINsphingomyelin n. (Biochemistry) a phospholipid, derived from sphingosine and choline, found in nerve tissue.
SPHINGOMYELIN n. a phospholipid derived from sphingosine, occurring in cell membranes.
SYNECPHONESISsynecphonesis n. (Grammar) A contraction of two syllables into one; synizesis.
SYNECPHONESIS n. the union into one syllable of two vowels without forming a recognized diphthong.

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: 72 words
  • Scrabble in French: 15 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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