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List of 15-letter words containing

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There are 20 fifteen-letter words containing F, O, 2R, S and 2T

AUTOTRANSFORMERautotransformer n. (Electrical engineering) A transformer with a single winding, its output being taken from taps.
AUTOTRANSFORMER n. a transformer in which the primary and secondary coils have part or all of their turns in common.
CERTIFICATORIEScertificatories n. Plural of certificatory.
CERTIFICATORY n. a certificate.
CONFRATERNITIESconfraternities n. Plural of confraternity.
CONFRATERNITY n. a society devoted esp. to a religious or charitable cause.
DENITRIFICATORSdenitrificators n. Plural of denitrificator.
DENITRIFICATOR n. an agent that denitrifies.
DIFFERENTIATORSdifferentiators n. Plural of differentiator.
DIFFERENTIATOR n. someone who or that which differentiates.
DIFFRACTOMETERSdiffractometers n. Plural of diffractometer.
DIFFRACTOMETER n. an instrument for determining structure of crystal through light diffraction.
FARTHINGSWORTHSfarthingsworths n. Plural of farthingsworth.
FARTHINGSWORTH n. as much as a farthing will buy.
FLORICULTURISTSfloriculturists n. Plural of floriculturist.
FLORICULTURIST n. one who practises floriculture.
FRATERNISATIONSfraternisations n. Plural of fraternisation.
FRATERNISATION n. the act of fraternising, also FRATERNIZATION.
FRATERNIZATIONSfraternizations n. Plural of fraternization.
FRATERNIZATION n. the act of fraternizing, also FRATERNISATION.
INTERFEROMETERSinterferometers n. Plural of interferometer.
INTERFEROMETER n. an instrument for analysing spectra of light.
PREFORMATIONISTpreformationist n. (Biology, historical) A proponent of the theory of preformationism.
PREFORMATIONIST adj. relating to preformation.
REAFFORESTATIONreafforestation n. Reforestation.
REAFFORESTATION n. the act of reafforesting.
REFLECTOMETRIESreflectometries n. Plural of reflectometry.
REFLECTOMETRY n. measurement by reflectometer.
REFORMATIONISTSREFORMATIONIST n. a supporter of reformation.
REFRACTOMETRIESrefractometries n. Plural of refractometry.
REFRACTOMETRY n. measurement by refractometer.
RETROREFLECTORSretroreflectors n. Plural of retroreflector.
RETROREFLECTOR n. a device that reflects radiation so that the paths of the reflected rays are parallel to those of the incident rays.
STRAIGHTFORWARDstraightforward adj. Proceeding in a straight course or manner; not deviating.
straightforward adj. Easy, simple, uncomplicated, without difficulty.
straightforward adj. (Figurative) direct; forthright; frank; sincere.
TRANSFIGURATIONtransfiguration n. A major change in appearance or form; a metamorphosis.
transfiguration n. A change that exalts or glorifies.
transfiguration n. Superposition of one or more ideal-elements in comparison with other real ones, often through imagination…
TRANSFORMATIONStransformations n. Plural of transformation.
TRANSFORMATION n. an act, process, or instance of transforming or being transformed.

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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