10-letter words containing a, p, r, o, s
- macroscope — A wide-field imaging device.
- macrospore — megaspore.
- madrepores — Plural form of madrepore.
- mailperson — A mailman or mailwoman.
- malapropos — inappropriate; out of place; inopportune; untimely: a malapropos remark.
- mascarpone — a very soft Italian cream cheese made from cow's milk.
- megaspores — the larger of the two kinds of spores characteristically produced by seed plants and a few fern allies, developing into a female gametophyte. Compare microspore.
- misprogram — to program badly or wrongly
- monographs — Plural form of monograph.
- morse lamp — a blinker lamp for signaling in Morse code.
- most-asper — harsh; rough.
- mousetraps — Plural form of mousetrap.
- mouthparts — Plural form of mouthpart.
- muciparous — muciferous.
- nanosphere — A nanoscale sphere.
- narcolepsy — a condition characterized by frequent and uncontrollable periods of deep sleep.
- neuroplasm — the cytoplasm of a nerve cell.
- neurospora — a genus of fast-growing orange-red fungus characterized by markings on the spores resembling axons, used widely in genetic and biochemical research
- nomographs — Plural form of nomograph.
- nonaspirin — (of a medicine) not containing aspirin
- nonpareils — Plural form of nonpareil.
- nonparties — Plural form of nonparty.
- nonspeaker — a person who does not or cannot speak
- nosography — the systematic description of diseases.
- oleographs — Plural form of oleograph.
- omniparous — producing or generating all things
- operagoers — Plural form of operagoer.
- operations — Plural form of operation.
- operatives — Plural form of operative.
- 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.
- organ stop — a set of organ pipes allowed to sound as a group by stopping all others
- orphanages — Plural form of orphanage.
- orpharions — Plural form of orpharion.
- outsparkle — to sparkle more brilliantly than
- outspreads — Third-person singular simple present indicative form of outspread.
- overpraise — to praise excessively or unduly.
- overspread — to spread or diffuse over: A blush of embarrassment overspread his face.
- oyster cap — an edible, brownish-gray to white mushroom, Pleurotus ostreatus, that grows in clusters on fallen trees and their stumps.
- pack-horse — a horse used for carrying goods, freight, supplies, etc.
- palaverous — a conference or discussion.
- pale horse — a representation of Death, as in literature or the Bible.
- palmerston — Henry John Temple, 3rd Viscount, 1784–1865, British statesman: prime minister 1855–58, 1859–65.
- panivorous — subsisting on bread; bread-eating.
- paper loss — an investment loss which has occurred but not yet been realized
- paper shop — A paper shop is a shop that sells newspapers and magazines, and also things such as tobacco, sweets, and cards.
- parabiosis — experimental or natural union of two individuals with exchange of blood.
- paraglossa — the outer lobe of the lingua or labium of certain insects
- paragnosis — knowledge obtained by supernatural means
- paralogism — argument violating principles of valid reasoning.
- parasitoid — an organism that practices parasitoidism.