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List of 12-letter words containing

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There are 14 twelve-letter words containing N, 2O, P, R and X

ENDOPEROXIDEendoperoxide n. (Chemistry, biochemistry) Any heterocycle containing a peroxide -O-O- residue in the ring; found especially…
ENDOPEROXIDE n. any of various biosynthetic intermediates in the formation of prostaglandins.
EXPLORATIONSexplorations n. Plural of exploration.
EXPLORATION n. the act or an instance of exploring.
EXPORTATIONSexportations n. Plural of exportation.
EXPORTATION n. the act of exporting.
EXPROBRATIONexprobration n. (Obsolete) Reproachful accusation; upbraiding.
EXPROBRATION n. the act of exprobrating, upbraiding.
EXPROMISSIONexpromission n. (Law) The intervention of a new debtor, substituted for the former one, who is consequently discharged…
EXPROMISSION n. relieving another person's debt by taking it upon oneself.
GROUNDPROXESGROUNDPROX n. an altitude warning system in aircraft.
MORPHOSYNTAXmorphosyntax n. (Linguistics) Morphology and syntax regarded as an interlinked unit.
morpho-syntax n. (Linguistics) The system of the internal structure of words (morphology) and the way in which words…
morpho-syntax n. (Linguistics, formal) Grammar.
OROPHARYNXESoropharynxes n. Plural of oropharynx.
OROPHARYNX n. the part of the pharynx between the soft palate and the epiglottis.
OVEREXPOSINGoverexposing v. Present participle of overexpose.
OVEREXPOSE v. to expose excessively.
PEROXIDATIONperoxidation n. (Chemistry) Any oxidation reaction, especially of an oxide, that produces a peroxide.
peroxidation n. (Organic chemistry) The reaction of a double bond with a peroxide.
PEROXIDATION n. the creation of a peroxide.
PNEUMOTHORAXpneumothorax n. (Medicine) Presence of air inside the pleural cavity, usually caused by injury either to the lung or the chest wall.
PNEUMOTHORAX n. accumulation of air or gas in the pleural cavity.
PRAXINOSCOPEpraxinoscope n. (Historical) An animation device invented in 1877 and used in early image projection. It consisted of…
PRAXINOSCOPE n. an instrument with mirrors in which a series of moving drawings appear as a continuously moving picture; an early form of cinematograph.
PROPOXYPHENEpropoxyphene n. Dextropropoxyphene.
PROPOXYPHENE n. a narcotic analgesic structurally related to methadone but less addicting.
PROXIMATIONSproximations n. Plural of proximation.
PROXIMATION n. immediate nearness in time, place, relationship, etc., also PROXIMITY.

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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