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List of 12-letter words containing

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There are 15 twelve-letter words containing I, 2N, 3O and P

ANTIMONOPOLYantimonopoly adj. (Law) Usually with respect to laws or policies: in opposition to the creation or continuance of a monopoly.
ANTIMONOPOLY adj. opposed to monopoly.
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.
GONADOTROPINgonadotropin n. Any of a group of protein hormones secreted by gonadotrope cells of the pituitary gland of vertebrates.
GONADOTROPIN n. a gonadotropic hormone, as follicle-stimulating hormone.
MONOCROPPINGmonocropping n. (Agriculture) The practice of growing a single crop year after year on the same land.
MONOCROP v. to plant the same crop in the same field year after year.
MONOPOLISINGmonopolising v. Present participle of monopolise.
MONOPOLISE v. to get a monopoly of, also MONOPOLIZE.
MONOPOLIZINGmonopolizing v. Present participle of monopolize.
MONOPOLIZE v. to get a monopoly of, also MONOPOLISE.
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.
PROLONGATIONprolongation n. The act of prolonging.
prolongation n. That which has been prolonged; an extension.
PROLONGATION n. the act of prolonging.
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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