10-letter words containing s, e, a, r, o
- proteinase — any of a group of enzymes that are capable of hydrolyzing proteins.
- protestant — any Western Christian who is not an adherent of a Catholic, Anglican, or Eastern Church.
- psammosere — a sere originating on sand or sandy soil.
- pseudocarp — accessory fruit.
- pyranoside — a glycoside containing a pyran ring structure.
- pyrolysate — a product of pyrolysis
- quarrelous — (now US) Quarrelsome; argumentative.
- quasiorder — (set theory) A preorder.
- quebrachos — Plural form of quebracho.
- race-horse — a horse bred or kept for racing, especially in flat races or steeplechases.
- racecourse — racetrack.
- racehorses — Plural form of racehorse.
- rackabones — 'a rack of bones', a metaphor for a person or animal that is very thin or emaciated
- raconteurs — Plural form of raconteur.
- raconteuse — a woman who is skilled in relating stories and anecdotes interestingly.
- radarscope — the viewing screen of radar equipment.
- radiculose — having small roots or rhizoids
- radioscope — an instrument, such as a fluoroscope, capable of detecting radiant energy
- radiosonde — an instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure, and humidity by means of a small radio transmitter.
- rainforest — a tropical forest, usually of tall, densely growing, broad-leaved evergreen trees in an area of high annual rainfall.
- raised bog — a bog of convex shape produced by growth of sphagnum and other bog plants in acid conditions and the subsequent build up of acid peat
- raisonneur — a character in a play, novel, or the like who voices the central theme, philosophy, or point of view of the work.
- ramboesque — looking or behaving like, or characteristic of, Rambo, a fictional film character noted for his mindless brutality
- rampageous — violent; unruly; boisterous.
- randomness — proceeding, made, or occurring without definite aim, reason, or pattern: the random selection of numbers.
- randomwise — in a random manner
- ransomable — capable of being ransomed
- ransomless — without ransom, not capable of being ransomed
- ransomware — malware planted illegally in a computer or mobile device that disables its operation or access to its data until the owner or operator pays to regain control or access.
- raree show — peep show.
- ratio test — the theorem that a given infinite series converges if the absolute value of the ratio of the term succeeding the n th term to the n th term approaches a limit less than 1 as n increases without bound.
- ravenously — extremely hungry; famished; voracious: feeling ravenous after a hard day's work.
- rawinsonde — a method of upper-atmosphere meteorological observation conducted by means of a radiosonde tracked by radar.
- rawsthorne — Alan. 1905–71, English composer, whose works include three symphonies, several concertos, and a set of Symphonic Studies (1939)
- re-arousal — arousal for a second or further time
- reaccustom — to familiarize by custom or use; habituate: to accustom oneself to cold weather.
- reafforest — to replant (an area that was formerly forested)
- reasonable — agreeable to reason or sound judgment; logical: a reasonable choice for chairman.
- reasonably — agreeable to reason or sound judgment; logical: a reasonable choice for chairman.
- reasonless — not having any reason or sense: an utterly reasonless display of anger.
- reclosable — capable of being closed again easily or tightly after opening: a reclosable box of crackers.
- recusation — the act of recusing a judge
- red salmon — sockeye salmon.
- reforecast — to predict (a future condition or occurrence); calculate in advance: to forecast a heavy snowfall; to forecast lower interest rates.
- reinvasion — the act or an instance of entering (a country, territory, etc) by military force again; a second or subsequent invasion
- removalist — a person or company that transports household effects to a new home
- repoussage — the art or process of working in repoussé.
- resolvable — that can be resolved.
- resonantly — resounding or echoing, as sounds: the resonant thundering of cannons being fired.
- resonating — to resound.