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There are 13 fifteen-letter words containing G, I, O, P, 2S, T and U

MULTIPROCESSINGmultiprocessing n. Computation using more than one processor.
MULTIPROCESSING n. the processing of several computer programs at the same time esp. by a computer system with two or more processors sharing a single memory.
OPISTHOGNATHOUSopisthognathous adj. (Zoology) Having retreating jaws or teeth.
OPISTHOGNATHOUS adj. with receding jaws.
PLAGIOSTOMATOUSplagiostomatous adj. (Zoology) Alternative form of plagiostomous.
PLAGIOSTOMATOUS adj. of or like a plagiostome, also PLAGIOSTOMOUS.
PNEUMATOLOGISTSpneumatologists n. Plural of pneumatologist.
PNEUMATOLOGIST n. a specialist in pneumatology.
PNEUMONOLOGISTSpneumonologists n. Plural of pneumonologist.
PNEUMONOLOGIST n. one who studies pneumonology.
POSTGRADUATIONSPOSTGRADUATION n. the period of time following graduation.
PRESTIGIOUSNESSprestigiousness n. The state or condition of being prestigious.
PRESTIGIOUSNESS n. the state of being prestigious.
PSYCHOLINGUISTSpsycholinguists n. Plural of psycholinguist.
PSYCHOLINGUIST n. a student of psycholinguistics.
SAUROPTERYGIANSsauropterygians n. Plural of sauropterygian.
SAUROPTERYGIAN n. any carnivorous Mesozoic marine reptile of the group Sauropterygia, with paddle-like limbs.
SUPERCOMPUTINGSSUPERCOMPUTING n. computing using a supercomputer, a large very fast mainframe used esp. for scientific computations.
SUPEREROGATIONSsupererogations n. Plural of supererogation.
SUPEREROGATION n. the act of performing more than is required by duty, obligation or need.
SUPERORGANICISTsuperorganicist n. One who subscribes to the philosophy of superorganicism.
SUPERORGANICIST n. one who studies the superorganic.
SUSPERCOLLATINGSUSPERCOLLATE v. to hang by the neck.

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: 74 words
  • Scrabble in French: 11 words
  • Scrabble in Spanish: 4 words
  • Scrabble in Italian: 17 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 8 words


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