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List of 13-letter words containing

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There are 19 thirteen-letter words containing F, I, 2O, P, S and T

FLAVOPROTEINSflavoproteins n. Plural of flavoprotein.
FLAVOPROTEIN n. a protein which serves as an electron carrier in the electron transfer chain.
FLUOROSCOPISTfluoroscopist n. One who carries out fluoroscopy.
FLUOROSCOPIST n. one who uses a fluoroscope.
INFRAPOSITIONinfraposition n. A situation or position beneath.
INFRAPOSITION n. the state of being placed below something else.
PERFOLIATIONSPERFOLIATION n. the state of being perfoliate.
PETROLIFEROUSpetroliferous adj. (Geology, petrology, of a rock or geologic formation) Containing or yielding petroleum.
PETROLIFEROUS adj. bearing petroleum.
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.
PONTIFICATORSpontificators n. Plural of pontificator.
PONTIFICATOR n. one who pontificates, speaks in a pompous and dogmatic manner.
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.
PROFECTITIOUSprofectitious adj. Proceeding from, or as if from, a parent; derived, as from an ancestor.
PROFECTITIOUS adj. derived from a parent or ancestor.
PROFESSORIATEprofessoriate n. Professors considered as a group or body.
professoriate n. (Dated) The office of a professor.
PROFESSORIATE n. the body of college and university teachers at an institution or in society, also PROFESSORIAT.
PROFESSORIATSprofessoriats n. Plural of professoriat.
PROFESSORIAT n. the body of college and university teachers at an institution or in society, also PROFESSORIATE.
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.
TELESCOPIFORMtelescopiform adj. Shaped like a telescope, with retractile tubular portions.
TELESCOPIFORM adj. in the form of a telescope.

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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