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There are 12 fifteen-letter words containing E, M, N, O, 2P and 2R

EPHEMEROPTERANSephemeropterans n. Plural of ephemeropteran.
EPHEMEROPTERAN n. any insect of the mayfly family.
HEMATOPORPHYRINhematoporphyrin n. (Biochemistry) The porphyrin portion of heme (minus the iron atom).
HEMATOPORPHYRIN n. any of several porphyrins that are hydrated derivatives of protoporphyrins.
MERCAPTOPURINESmercaptopurines n. Plural of mercaptopurine.
MERCAPTOPURINE n. an antimetabolite sometimes used in the treatment of acute leukemia.
MISPROPORTIONEDmisproportioned adj. Having incorrect or distorted proportions.
misproportioned v. Simple past tense and past participle of misproportion.
MISPROPORTION v. to proportion wrongly.
PREPERFORMANCESpreperformances n. Plural of preperformance.
PREPROGRAMMINGSPREPROGRAMMING n. the act of programming beforehand.
PROPERISPOMENONproperispomenon adj. (Linguistics, of a word) In Greek grammar, having a circumflex accent on the penultimate syllable.
properispomenon n. (Linguistics) A word having such an accent.
PROPERISPOMENON n. a word with the circumflex accent on the penultimate syllable.
PROPORTIONMENTSproportionments n. Plural of proportionment.
PROPORTIONMENT n. the act of proportioning.
REAPPORTIONMENTreapportionment n. The act of reapportioning; a second or subsequent apportionment.
reapportionment n. (US, politics) Reassignment of representation in a legislature, especially of U.S. House of Representative…
REAPPORTIONMENT n. the act of reapportioning.
RHOMBENPORPHYRSRHOMBENPORPHYR n. an intermediate, moderately fine-grained igneous rock with feldspar phenocrysts rhombic in section, also RHOMBENPORPHYRY, RHOMBPORPHYRY.
RHOMBENPORPHYRYRHOMBENPORPHYRY n. an intermediate, moderately fine-grained igneous rock with feldspar inclusions, also RHOMBENPORPHYR, RHOMBPORPHYRY.
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: 59 words
  • Scrabble in French: 7 words
  • Scrabble in Spanish: 9 words
  • Scrabble in Italian: 44 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 14 words


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