10-letter words containing o, p, s, i
- noviceship — The state or position of being a novice.
- occipitals — Plural form of occipital.
- octoploids — Plural form of octoploid.
- oenophiles — Plural form of oenophile.
- offsprings — children or young of a particular parent or progenitor.
- oligopsony — the market condition that exists when there are few buyers, as a result of which they can greatly influence price and other market factors.
- omniparous — producing or generating all things
- on deposit — payable as the first instalment, as when buying on hire-purchase
- on impulse — instinctively
- onion soup — a soup or broth made from onions and stock
- oophoritis — inflammation of an ovary, usually combined with an inflammation of the Fallopian tubes; ovaritis.
- opalescing — Present participle of opalesce.
- open sight — (on a firearm) a rear sight consisting of a notch across which the gunner aligns the front sight on the target.
- open-sided — having a side or sides open.
- operations — Plural form of operation.
- operatives — Plural form of operative.
- opinionist — One fond of his own notions, or unduly attached to his own opinions.
- opisometer — an instrument used to measure curved lines on a map
- opium wars — a war between Great Britain and China that began in 1839 as a conflict over the opium trade and ended in 1842 with the Chinese cession of Hong Kong to the British, the opening of five Chinese ports to foreign merchants, and the grant of other commercial and diplomatic privileges in the Treaty of Nanking.
- opposingly — to act against or provide resistance to; combat.
- oppositely — 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.
- opposition — the action of opposing, resisting, or combating.
- oppositive — Expressing contrariety.
- oppressing — to burden with cruel or unjust impositions or restraints; subject to a burdensome or harsh exercise of authority or power: a people oppressed by totalitarianism.
- oppression — the exercise of authority or power in a burdensome, cruel, or unjust manner.
- oppressive — burdensome, unjustly harsh, or tyrannical: an oppressive king; oppressive laws.
- opsomaniac — a person with an extreme enthusiasm for a particular food
- optic axis — (in a crystal exhibiting double refraction) the direction or directions, uniaxial or biaxial, respectively, along which this phenomenon does not occur.
- optic disc — a small oval-shaped area on the retina marking the site of entrance into the eyeball of the optic nerve
- optic disk — blind spot (sense 1)
- optimising — to make as effective, perfect, or useful as possible.
- optimistic — disposed to take a favorable view of events or conditions and to expect the most favorable outcome.
- optologist — a person who tests eyes for lenses
- orpharions — Plural form of orpharion.
- orthoepist — the study of correct pronunciation.
- orthoprism — a prism which has faces parallel to its vertical axis
- orthoptics — a method of exercising the eye and its muscles in order to cure strabismus or improve vision.
- orthoptist — One who practices orthoptics.
- osteopenia — Reduced bone mass of lesser severity than osteoporosis.
- ostpolitik — the German policy toward the Soviet Union and Eastern Europe, especially the expansionist views of Hitler in the 1930s and the normalization program of the West German government in the 1960s and 1970s.
- outpassion — to surpass in passion
- outpromise — to promise more than
- oven chips — chips or fries that can be cooked in the oven
- overimpose — to lay on or set as something to be borne, endured, obeyed, fulfilled, paid, etc.: to impose taxes.
- overpraise — to praise excessively or unduly.
- oversimple — excessively simple
- oversimply — in an oversimple manner
- ovipositor — (in certain female insects) an organ at the end of the abdomen, by which eggs are deposited.
- palimscope — a hand instrument that produces concentrated ultraviolet light for reading palimpsests and other research materials.
- palinopsia — a visual disorder in which the patient perceives a prolonged afterimage