9-letter words containing o, s, i, p
- midpoints — Plural form of midpoint.
- mileposts — Plural form of milepost.
- millponds — Plural form of millpond.
- minorship — the state of being a minor
- misemploy — to use for the wrong purpose; use wrongly or improperly; misuse.
- mishpocha — an entire family network comprising relatives by blood and marriage and sometimes including close friends; clan.
- misopedia — hatred of children, especially one's own.
- misprison — Misconstruction of misprision.
- misreport — to report incorrectly or falsely.
- misspoken — Simple past tense and past participle of misspeak.
- mock lisp — The Lisp used by the Gosling Emacs editor.
- morphisms — Plural form of morphism.
- morphosis — the sequence or manner of development or change in an organism or any of its parts.
- moss pink — a phlox, Phlox subulata, of the eastern U.S., having showy pink to purple flowers.
- motorship — a ship driven by a diesel or other internal-combustion engine.
- myriapods — Plural form of myriapod.
- neoplasia — Pathology. tumor growth.
- nephrosis — kidney disease, especially marked by noninflammatory degeneration of the tubular system.
- nicopolis — city in ancient Epirus
- nightspot — a nightclub.
- nilopolis — a city in SE Brazil, NW of Rio de Janeiro.
- nine-spot — a playing card the face of which bears nine pips.
- nipponese — Japanese
- nonpapist — not papist, not Roman Catholic
- noscapine — (biochemistry) A benzylisoquinoline alkaloid obtained from plants of the Papaveraceae family, primarily used for its antitussive effects.
- nosepiece — the part of a frame for eyeglasses that passes over the bridge of the nose.
- occupiers — Plural form of occupier.
- off-piste — of or relating to skiing on virgin snow off the regular runs
- offprints — Plural form of offprint.
- offspring — children or young of a particular parent or progenitor.
- oil press — a device for extracting oil from plant material, esp. olives
- oil spill — an accidental release of oil into a body of water, as from a tanker, offshore drilling rig, or underwater pipeline, often presenting a hazard to marine life and the environment.
- olympiads — Plural form of olympiad.
- opacities — the state or quality of being opaque.
- open side — the side of the scrum on which the majority of the backs are ranged
- operatics — Exaggerated or overly emotional behaviour; histrionics.
- operosity — the quality or characteristic of being operose
- ophiuchus — a large constellation lying on the celestial equator between Hercules and Scorpius and containing the dark nebula, Ophiuchus Nebula
- opisthion — (anatomy) The middle of the posterior, or dorsal, margin of the great foramen of the skull.
- opposites — situated, placed, or lying face to face with something else or each other, or in corresponding positions with relation to an intervening line, space, or thing: opposite ends of a room.
- opsomania — an extreme enthusiasm for a particular food
- opsonized — Simple past tense and past participle of opsonize.
- optatives — Plural form of optative.
- opticians — Plural form of optician.
- optimised — to make as effective, perfect, or useful as possible.
- optimiser — Alternative spelling of optimizer.
- optimises — Third-person singular simple present indicative form of optimise.
- optimists — an optimistic person.
- optimizes — Third-person singular simple present indicative form of optimize.
- optronics — Optoelectronics.