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List of 13-letter words containing

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There are 20 thirteen-letter words containing F, I, N, 2O, P and T

FLAVOPROTEINSflavoproteins n. Plural of flavoprotein.
FLAVOPROTEIN n. a protein which serves as an electron carrier in the electron transfer chain.
IMPERFORATIONimperforation n. The state of being without perforation.
imperforation n. (Medicine) Absence of perforation in a normally patent structure.
IMPERFORATION n. the state of being imperforate.
INFRAPOSITIONinfraposition n. A situation or position beneath.
INFRAPOSITION n. the state of being placed below something else.
OUTPERFORMINGoutperforming v. Present participle of outperform.
OUTPERFORM v. to exceed in performance.
PERFOLIATIONSPERFOLIATION n. the state of being perfoliate.
PHOTOFINISHERphotofinisher n. One who develops customers’ films into photographic prints.
PHOTOFINISHER n. one that develops and prints photographic film commercially.
PHOTOFISSIONSphotofissions n. Plural of photofission.
photofissions v. Third-person singular simple present indicative form of photofission.
PHOTOFISSION n. nuclear fission induced by gamma rays.
PONTIFICATIONpontification n. The act of pontificating.
PONTIFICATION n. the act of pontificating, speaking in a pompous and dogmatic manner.
PONTIFICATORSpontificators n. Plural of pontificator.
PONTIFICATOR n. one who pontificates, speaks in a pompous and dogmatic manner.
PORNIFICATIONpornification n. Conversion to the style or level of pornography.
PORNIFICATION n. the introduction of pornographic elements into a film etc.
POSTINFECTIONpostinfection adj. (Medicine) Occurring after an infection.
postinfection adv. (Medicine) After an infection.
postinfection n. (Medicine) An infection that arises after a medical procedure.
POSTMODIFYINGpostmodifying v. Present participle of postmodify.
POSTMODIFY v. to modify the sense of (a word or phrase) by being placed after it.
PREFLORATIONSpreflorations n. Plural of prefloration.
PREFLORATION n. the manner in which the petals and sepals are folded in the flower-bud.
PREFOLIATIONSprefoliations n. Plural of prefoliation.
PREFOLIATION n. the manner in which the leaf is folded within the leaf bud, vernation.
PREFORMATIONSpreformations n. Plural of preformation.
PREFORMATION n. previous formation.
PROLIFERATIONproliferation n. (Uncountable) The process by which an organism produces others of its kind; breeding, propagation, procreation…
proliferation n. (Countable) The act of increasing or rising; augmentation, amplification, enlargement, escalation, aggrandizement.
proliferation n. (Countable) The result of building up; buildup, accretion.
PROLIFICATIONprolification n. (Dated) The generation of young.
prolification n. (Dated, botany) Reproduction by the growth of a plant, or part of a plant, directly from an older one, or by gemmae.
PROLIFICATION n. the production of young; development of a shoot by continued growth of a flower.
PUSSYFOOTINGSPUSSYFOOTING n. the act of approaching a topic with great caution.
RUSTPROOFINGSRUSTPROOFING n. the act of making resistant to rust, such as by applying a coating.
WATERPROOFINGwaterproofing v. Present participle of waterproof.
waterproofing n. The treatment of something to make it waterproof.
waterproofing n. A waterproof material.

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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