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List of 15-letter words containing

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There are 16 fifteen-letter words containing I, O, 4S and Y

ASTROPHYSICISTSastrophysicists n. Plural of astrophysicist.
ASTROPHYSICIST n. a student of astrophysics.
BIOSYSTEMATISTSbiosystematists n. Plural of biosystematist.
BIOSYSTEMATIST n. one who studies biosystematics.
COMMISSARYSHIPScommissaryships n. Plural of commissaryship.
COMMISSARYSHIP n. the office of commissary.
EASYGOINGNESSESEASYGOINGNESS n. EASYGOING, tolerant.
HOYDENISHNESSESHOYDENISHNESS n. HOYDENISH, like a hoyden, also HOIDENISH.
IMMUNOASSAYISTSIMMUNOASSAYIST n. one who carries out immunoassays.
POLYSYNTHESISMSPOLYSYNTHESISM n. the state of being polysynthetic.
PREPOSSESSINGLYprepossessingly adv. In a prepossessing manner.
PREPOSSESSING adv. creating a favorable impression; attractive.
PSYCHOSYNTHESISpsychosynthesis n. A form of psychology based on the direct experience of the self.
PSYCHOSYNTHESIS n. a form of psychotherapy combining psychoanalytic techniques with meditation and exercise.
PYCNODYSOSTOSISpycnodysostosis n. (Medicine) A genetic disorder characterized by dense, fragile bones and dwarfism.
PYCNODYSOSTOSIS n. a rare inherited bone disease characterized by short stature and thickening and fragility of the bones.
PYKNODYSOSTOSISpyknodysostosis n. Alternative form of pycnodysostosis.
PYKNODYSOSTOSIS n. a rare inherited bone disease characterized by short stature and thickening and fragility of the bones.
SCHOOLMISTRESSYschoolmistressy adj. Resembling or characteristic of a schoolmistress.
SCHOOLMISTRESSY adj. like a schoolmistress, prim.
SYNAPOSEMATISMSSYNAPOSEMATISM n. warning coloration common to many species in region.
SYNTHESISATIONSSYNTHESISATION n. the process of synthesising, also SYNTHESIZATION.
TOMBOYISHNESSESTOMBOYISHNESS n. the state of being tomboyish.
YELLOWISHNESSESYELLOWISHNESS n. the state of being yellowish.

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: 32 words
  • Scrabble in French: 19 words
  • Scrabble in Spanish: 2 words
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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