9-letter words containing p, o, r, t
- monotropy — polymorphism that is irreversible.
- morphotic — (biology) Connected with, or becoming an integral part of, a living unit or of the morphological framework.
- mothproof — resistant to attack by moths.
- motorship — a ship driven by a diesel or other internal-combustion engine.
- mousetrap — a trap for mice, especially one consisting of a rectangular wooden base on which a metal spring is mounted.
- mouthpart — Usually, mouthparts. the appendages surrounding or associated with the mouth of arthropods.
- multiport — Computers. having more than one port.
- myatrophy — myoatrophy.
- n'importe — no matter
- negropont — Euboea.
- nephrotic — Pertaining to, resembling or caused by nephrosis.
- neuropath — A person affected by nervous disease, or with an abnormally sensitive nervous system.
- no-trumps — a bid or contract to play without trumps
- nonexpert — A person who is not an expert.
- nonparent — a person who is not a parent
- nonparity — the condition of having no parity; the state of not being equal
- nonprofit — not established for the purpose of making a profit; not entered into for money: a nonprofit institution.
- nootropic — (medicine) Any substance purported to increase cognitive abilities.
- northport — a town in central Alabama.
- notepaper — writing paper, especially that used in writing notes or personal correspondence and usually less than 8½ × 11 inches (21.6 × 27.9 cm) in size.
- obreption — Canon Law. fraud in obtaining or attempting to obtain something from an official. Compare subreption (def 1).
- octothorp — Another term for the pound sign ().
- of repute — A person or thing of repute or of high repute is respected and known to be good.
- offprints — Plural form of offprint.
- on patrol — monitoring an area
- opera hat — a man's tall, collapsible top hat, held open or in shape by springs and usually covered with a black, silky fabric. Also called gibus. Compare beaver1 (def 4), silk hat, top hat.
- operantly — In an operant manner.
- operatics — Exaggerated or overly emotional behaviour; histrionics.
- operating — used or engaged in performing operations: an operating surgeon.
- operation — an act or instance, process, or manner of functioning or operating.
- operative — a person engaged, employed, or skilled in some branch of work, especially productive or industrial work; worker.
- operatize — to turn (a play, novel, etc) into an opera
- operators — Plural form of operator.
- operatory — a room or other area with special equipment and facilities, as for dental surgery, scientific experiments, or the like.
- operettas — Plural form of operetta.
- operosity — the quality or characteristic of being operose
- opportune — appropriate, favorable, or suitable: an opportune phrase for the occasion.
- optimiser — Alternative spelling of optimizer.
- optimizer — A person in a large business whose task is to maximize profits and make the business more efficient.
- optometer — any of various instruments for measuring the refractive error of an eye.
- optometry — the practice or profession of examining the eyes, by means of suitable instruments or appliances, for defects in vision and eye disorders in order to prescribe corrective lenses or other appropriate treatment.
- optronics — Optoelectronics.
- orpington — one of a breed of large, white-skinned chickens.
- orthoepic — Of or pertaining to orthoepy.
- orthopedy — Archaic form of orthopedics.
- orthopnea — difficult or painful breathing except in an erect sitting or standing position.
- orthopods — an orthopedist.
- orthopter — ornithopter
- orthoptic — pertaining to or producing normal binocular vision.
- out-group — people outside one's own group, especially as considered to be inferior or alien; a group perceived as other than one's own.