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There are 10 fifteen-letter words containing E, I, N, 2P, 2R and Y

HEMATOPORPHYRINhematoporphyrin n. (Biochemistry) The porphyrin portion of heme (minus the iron atom).
HEMATOPORPHYRIN n. any of several porphyrins that are hydrated derivatives of protoporphyrins.
HYPERPOLARISINGhyperpolarising v. Present participle of hyperpolarise.
HYPERPOLARISE v. to increase the difference in electric potential across a cell membrane, also HYPERPOLARIZE.
HYPERPOLARIZINGhyperpolarizing v. Present participle of hyperpolarize.
HYPERPOLARIZE v. to produce an increase in potential difference across a biological membrane, also HYPERPOLARISE.
HYPERPRODUCTIONhyperproduction n. Excessive production.
HYPERPRODUCTION n. excessive production.
HYPERRESPONSIVEhyperresponsive adj. Involving an abnormally high degree of responsiveness.
HYPERRESPONSIVE adj. excessively responsive.
INAPPROPRIATELYinappropriately adv. In an inappropriate manner.
INAPPROPRIATE adv. not appropriate, also UNAPPROPRIATE.
PERPENDICULARLYperpendicularly adv. In a perpendicular manner.
PERPENDICULAR adv. at right angles to a line or plane.
PORPHYROGENITESporphyrogenites n. Plural of porphyrogenite.
PORPHYROGENITE n. a Byzantine emperor's son, born in the purple.
PROPORTIONATELYproportionately adv. In a proportionate manner; with due proportion; proportionally.
PROPORTIONATE adv. in proportion.
SEMIPORNOGRAPHYsemipornography n. Material that is partly or somewhat pornographic.
SEMIPORNOGRAPHY n. material approaching the pornographic.

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: 73 words
  • Scrabble in French: 10 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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