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There are 7 twelve-letter words containing D, E, I, O, 2P, S and Y

HYPNOPAEDIASHYPNOPAEDIA n. training or instruction during sleep.
HYPOPLOIDIEShypoploidies n. Plural of hypoploidy.
HYPOPLOIDY n. the state of being hypoploid, having a chromosome number a few below the normal diploid number.
POLYDISPERSEpolydisperse adj. (Of a colloid) Having a range of particle sizes.
polydisperse adj. (Of a polymer, proscribed) Synonym of nonuniform (“composed of macromolecular species of differing molar masses”).
POLYDISPERSE adj. characterized by particles of varied sizes in the dispersed phase of a disperse system.
POLYPEPTIDESpolypeptides n. Plural of polypeptide.
POLYPEPTIDE n. a compound containing between 10 and 100 peptides.
POLYPLOIDIESpolyploidies n. Plural of polyploidy.
POLYPLOIDY n. the condition of being polyploid.
POLYSULPHIDEpolysulphide n. (Chemistry) Alternative spelling of polysulfide.
POLYSULPHIDE n. a sulfide containing two or more atoms of sulfur in the molecule, also POLYSULFIDE.
PROPYLITISEDPROPYLITISE v. to become or turn into propylite, also PROPYLITIZE.

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: 28 words
  • Scrabble in French: 3 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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