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List of 12-letter words containing

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There are 16 twelve-letter words containing 2O, P, S and 3T

OPTOMETRISTSoptometrists n. Plural of optometrist.
OPTOMETRIST n. an ophthalmic optician; a person qualified to practise optometry.
ORTHOPTERISTorthopterist n. An entomologist who specialises in orthopters.
ORTHOPTERIST n. a student of insects.
OSTEOPATHISTosteopathist n. An osteopath.
OSTEOPATHIST n. a practitioner of osteopathy, also OSTEOPATH.
PHOTOMETRISTphotometrist n. A specialist in photometry.
PHOTOMETRIST n. one who practises photometry, that branch of science which treats of the measurement of the intensity of light.
PHOTOSETTERSphotosetters n. Plural of photosetter.
PHOTOSETTER n. an apparatus for photosetting.
PHOTOSETTINGphotosetting v. Present participle of photoset.
PHOTOSETTING n. composing (matter) by projecting film from which a printing plate is made.
PHOTOSTATINGphotostating v. Present participle of photostat.
PHOTOSTAT v. to make facsimiles by this means.
PHOTOSTATTEDphotostatted v. Simple past tense and past participle of photostat.
PHOTOSTAT v. to make facsimiles by this means.
PHOTOTYPESETphototypeset v. (Transitive) To typeset by a phototypesetting process.
PHOTOTYPESET v. to set (type matter) by phototypesetting.
PHYTOTOMISTSphytotomists n. Plural of phytotomist.
PHYTOTOMIST n. a student of phytotomy.
POTENTIATORSpotentiators n. Plural of potentiator.
POTENTIATOR n. one who potentiates.
POTSHOTTINGSPOTSHOTTING n. the act of taking a potshot.
PROSTITUTIONprostitution n. Engaging in sexual activity with another person for pay.
prostitution n. (By extension) Engaging in sexual activity with another person in exchange for goods (not necessarily…
prostitution n. (By extension) Debasement for profit or impure motives.
PROSTITUTORSprostitutors n. Plural of prostitutor.
PROSTITUTOR n. one who prostitutes.
PROTESTATIONprotestation n. A formal solemn objection or other declaration.
protestation n. (Law, historical) A declaration in common-law pleading, by which the party interposes an oblique allegation…
PROTESTATION n. an avowal or solemn declaration.
TROPOSCATTERtroposcatter n. Tropospheric scatter.
TROPOSCATTER n. the propagation of radio waves by using irregularities in the troposphere to scatter the signals beamed up by means of high-powered UHF transmitters and parabolic antennas.

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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