20-letter words containing o, p, e, r, a, l
- relative deprivation — the perception of an unfair disparity between one's situation and that of others.
- relative probability — a measure or estimate of the degree of confidence one may have in the occurrence of an event, defined as the limit of the proportion observed in a sample as the sample size tends to infinity
- republic of maldives — a republic occupying an archipelago of 1087 coral islands in the Indian Ocean, southwest of Sri Lanka: came under British protection in 1887; became independent in 1965 and a republic in 1968; member of the Commonwealth (1982–2016). The economy and infrastructure were severely damaged in the Indian Ocean tsunami of December 2004. Official language: Divehi. Official religion: (Sunni) Muslim. Currency: rufiyaa. Capital: Malé. Pop: 393 988 (2013 est). Area: 298 sq km (115 sq miles)
- request for proposal — (programming) (RFP) The publication by a prospective software purchaser of details of the required system in order to attract offers by software developers to supply it. Software development under contract starts with the selection of the software developer by the customer. A request for proposal (also called in Britain an "invitation to tender") is the beginning of the selection process.
- royal leamington spa — a city in Warwickshire, central England: health resort.
- sailor's breastplate — a knot consisting of three overlapping loops formed by a single rope passed alternately over and under itself at crossings.
- satellite photograph — a photograph taken by an artificial satellite from space
- schizoid personality — sb with identity disorder
- semiautobiographical — pertaining to or being a fictionalized account of an author's own life.
- separation allowance — an allowance paid to a member of the military when they are forced to be apart from their family due to their military duties
- sharp-tailed sparrow — a sparrow, Ammospiza caudacuta, inhabiting salt marshes in North America, having narrow, sharply pointed tail feathers.
- south american plate — a major tectonic division of the earth's crust, comprising the continent of South America and several ocean basins and bounded on the north by the Caribbean Plate, on the east by the Mid-Atlantic Ridge, on the west by a submarine trench that borders the western coast of the continent, and on the south by the Antarctic Plate.
- spanish oyster plant — a composite plant, Scolymus hispanicus, of southern Europe, having spiny, thistlelike leaf margins, small yellow flowers, and an edible root.
- special boat service — a unit of the Royal Marines specializing in reconnaissance and sabotage
- special patrol group — a former police unit tasked with counter terrorism in the Royal Ulster Constabulary
- special relationship — the exceptionally close political, diplomatic, cultural and historical relations between the United States and the United Kingdom
- spherical aberration — variation in focal length of a lens or mirror from center to edge, due to its spherical shape.
- spherical coordinate — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
- spiral of archimedes — a curve that is the locus of a point that moves outward with uniform speed along a vector, beginning at the origin, while the vector rotates about the origin with uniform angular velocity. Equation (in polar coordinates): r = aθ.
- spotted crane's-bill — the American wild geranium, Geranium maculatum.
- state highway patrol — a state's road traffic police
- teletype corporation — (company) The company which made Teletype teletypewriters. Address: Skokie, Illinois, USA.
- television programme — a programme broadcast on television
- the legal profession — the profession of law
- to clean up your act — If someone who has been behaving badly cleans up their act, they start to behave in a more acceptable or responsible way.
- to keep your balance — If you keep your balance, for example, when standing in a moving vehicle, you remain steady and do not fall over. If you lose your balance, you become unsteady and fall over.
- to scrape the barrel — If you say that someone is scraping the barrel, or scraping the bottom of the barrel, you disapprove of the fact that they are using or doing something of extremely poor quality.
- tropical continental — a type of warm, dry air mass originating at low latitudes over land areas
- tropical disturbance — a very weak, or incipient, tropical cyclone.
- trumpet call for sth — a signal for something
- upper layer protocol — (protocol) 1. (ULP, or upper-layer protocol) Any protocol residing in OSI layers five or above. The Internet protocol suite includes many upper layer protocols representing a wide variety of applications e.g. FTP, NFS, RPC, and SMTP. These and other network applications use the services of TCP/IP and other lower layer protocols to provide users with basic network services. 2. A protocol higher in the OSI reference model than the current reference point. Upper Layer Protocol is often used to refer to the next-highest protocol in a particular protocol stack.
- upper yosemite falls — a section of Yosemite Falls in central California, in the Yosemite National Park that is 436 m (1430 ft) high
- vertical envelopment — envelopment of an enemy accomplished by parachuting and landing airborne troops at the rear of the enemy's position.
- winter olympic games — an international contest of winter sports, esp skiing, held every four years
- working relationship — a relationship with a colleague, boss or employee