10-letter words containing o, p, e, r, a
- approvance — approval
- approvedly — So as to secure approbation; in an approved manner.
- apterygote — belonging or pertaining to the Apterygota, a subclass of primitive wingless insects that undergo little or no metamorphosis.
- archespore — the cell or group of cells in a sporangium that gives rise to spores
- archipenko — Aleksandr Porfiryevich (alɪkˈsandr parˈfirjɪvitʃ). 1887– 1964, Russian sculptor and painter, in the US after 1923, whose work is characterized by economy of form
- arctophile — a person who collects teddy bears or is fond of them
- area opaca — the opaque area of the blastoderm surrounding the area pellucida.
- areography — the description of the physical features, such as the surface, atmosphere, etc, of the planet Mars
- areopagite — a member of the Areopagus, a judicial council of ancient Athens that met on the hill of that name
- aristotype — a process of photographic printing in which paper coated with silver chloride in gelatin is used.
- armipotent — strong in arms or war
- arpeggione — a stringed musical instrument of the early 19th century which was played with a bow
- ascospores — Plural form of ascospore.
- asperation — The act of asperating; a making or becoming rough.
- aspersions — disparaging or malicious remarks; slanderous accusations
- aspersoria — Plural form of aspersorium.
- atmosphere — A planet's atmosphere is the layer of air or other gases around it.
- atropatene — Media Atropatene.
- attoparsec — (unit, humour) About 31 mm (one inch). "atto-" is the standard SI prefix for multiplication by 10^-18. A parsec (parallax-second) is 3.26 light-years; an attoparsec is thus 3.26 * 10^-18 light years. Thus, one attoparsec per microfortnight is about one inch per second. This unit is reported to be in use (though probably not very seriously) among hackers in the UK.
- auriscopes — Plural form of auriscope.
- autorepeat — Any feature that repeats an action automatically.
- auxospores — Plural form of auxospore.
- azeotropes — Plural form of azeotrope.
- azygospore — a thick-walled spore produced by parthenogenesis in certain algae and fungi
- barbershop — Barbershop is a style of singing where a small group of people, usually men, sing in close harmony and without any musical instruments accompanying them.
- bargepoles — Plural form of bargepole.
- baroceptor — Baroreceptor.
- barpersons — Plural form of barperson.
- baseperson — (baseball, softball) A fielder (of either gender) positioned near a base.
- beg-pardon — an expression of apology (used especially in the phrase with no beg-pardons).
- biographee — a person whose biography has been written
- biographer — Someone's biographer is a person who writes an account of their life.
- biotherapy — the treatment of disease by means of substances, as serums, vaccines, penicillin, etc., secreted by or derived from living organisms
- bipolarize — to make bipolar
- bladderpod — any of several plants belonging to the genera Alyssoides and Lesquerella, of the mustard family, having inflated seed pods.
- blastopore — the opening of the archenteron in the gastrula that develops into the anus of some animals
- boarded-up — with windows and doors covered with boards for security
- bodyshaper — an undergarment which flattens the stomach, bottom etc
- bond paper — a superior quality of strong white paper, used esp for writing and typing
- borah peak — a mountain in central Idaho, in the Lost River Range: highest peak in Idaho. 12,662 feet (3861 meters).
- brainpower — Brainpower is intelligence or the ability to think.
- bread shop — a baker's shop
- breakpoint — an instruction inserted by a debug program causing a return to the debug program
- breastplow — a cultivator moved forward by a person pressing the chest against a crossbar.
- broadpiece — an English coin replaced by the guinea in 1663
- buonaparte — Bonaparte1
- caecotroph — (biology) In certain mammals, especially rabbits and some rodents, a cake or pellet of food which is produced by means of digestion and expulsion through the anus.
- camelopard — giraffe
- camphorate — to apply, treat with, or impregnate with camphor
- can opener — A can opener is the same as a tin opener.