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There are 10 twelve-letter words containing I, 2N, 3O, P and S

APOLLONICONSapollonicons n. Plural of apollonicon.
APOLLONICON n. a gigantic barrel organ, partly automatic.
COSPONSORINGcosponsoring v. Present participle of cosponsor.
co-sponsoring v. Present participle of co-sponsor.
COSPONSOR v. to sponsor jointly.
MONOPOLISINGmonopolising v. Present participle of monopolise.
MONOPOLISE v. to get a monopoly of, also MONOPOLIZE.
MONOPSONISTSmonopsonists n. Plural of monopsonist.
MONOPSONIST n. a participant in a monopsony.
NONPOISONOUSnonpoisonous adj. Not poisonous.
non-poisonous adj. Alternative spelling of nonpoisonous.
NONPOISONOUS adj. not poisonous.
OPINIONATORSopinionators n. Plural of opinionator.
OPINIONATOR n. one who holds or gives an opinion.
OPSONISATIONopsonisation n. (British spelling, immunology) Alternative spelling of opsonization.
OPSONISATION n. the process of opsonising, also OPSONIZATION.
OPSONIZATIONopsonization n. (Immunology) The process or result of opsonizing.
OPSONIZATION n. the process of opsonizing, also OPSONISATION.
PROTONATIONSprotonations n. Plural of protonation.
PROTONATION n. the acquisition of an additional proton.
PYCNOGONOIDSpycnogonoids n. Plural of pycnogonoid.
PYCNOGONOID n. a sea-spider, also PYCNOGONID.

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: 65 words
  • Scrabble in French: 24 words
  • Scrabble in Spanish: 10 words
  • Scrabble in Italian: 32 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 1 word


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