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There are 18 fifteen-letter words containing N, 2O, P and 4S

AMORPHOUSNESSESAMORPHOUSNESS n. the state of being amorphous.
COMPOSITENESSESCOMPOSITENESS n. COMPOSITE, made of distinct things.
CONGRESSPERSONScongresspersons n. Plural of congressperson.
CONGRESSPERSON n. a congressman or congresswoman.
CONSPICUOUSNESSconspicuousness n. Openness or exposure to the view; a state of being clearly visible.
conspicuousness n. The property of being clearly discernible by the mind; obviousness.
conspicuousness n. Eminence; celebrity; renown.
OUTSPOKENNESSESoutspokennesses n. Plural of outspokenness.
OUTSPOKENNESS n. the state of being outspoken.
PHOTOSENSITISESphotosensitises v. Third-person singular simple present indicative form of photosensitise.
PHOTOSENSITISE v. to make photosensitive by chemical or other means, also PHOTOSENSITIZE.
POISONOUSNESSESPOISONOUSNESS n. POISONOUS, having the quality or effect of poison.
PONDEROUSNESSESponderousnesses n. Plural of ponderousness.
PONDEROUSNESS n. the state of being ponderous.
PROGRESSIONISMSPROGRESSIONISM n. sympathy with or advocacy of progress; belief that social or other evolution is towards higher or better things.
PROGRESSIONISTSprogressionists n. Plural of progressionist.
PROGRESSIONIST n. a supporter of progressionism.
PROMISCUOUSNESSpromiscuousness n. The state or condition of being promiscuous.
PROMISCUOUSNESS n. the state of being promiscuous.
PYCNODYSOSTOSESpycnodysostoses n. Plural of pycnodysostosis.
PYCNODYSOSTOSIS n. a rare inherited bone disease characterized by short stature and thickening and fragility of the bones.
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.
PYKNODYSOSTOSESPYKNODYSOSTOSIS 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.
SAPONACEOUSNESSsaponaceousness n. The quality of being saponaceous.
SAPONACEOUSNESS n. the state of being saponaceous, slippery; soapy.
SPONTANEOUSNESSspontaneousness n. The state or condition of being spontaneous; spontaneity.
SPONTANEOUSNESS n. the state of being spontaneous.
SUPPOSITIONLESSSUPPOSITIONLESS adj. without supposition.

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: 43 words
  • Scrabble in French: 71 words
  • Scrabble in Spanish: 1 word
  • Scrabble in Italian: 18 words
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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