13-letter words containing a, s, p, o
- spectatorship — the state of being a spectator
- spectrography — a spectroscope for photographing or producing a representation of a spectrum.
- speleotherapy — a form of treatment for asthma sufferers that takes place in clinics in disused mines, in which the air is free of pollen, dust mites, and the other irritants that provoke an allergic reaction; used to reduce the risk of heart disease
- spermatoblast — a reproductive cell
- spermatogenic — relating to the development of spermatozoa
- spermatophore — a capsule surrounding a mass of spermatozoa, produced by the male of various animal species and transferred to the female.
- spermatophyte — any of the Spermatophyta, a primary division or group of plants comprising those that bear seeds.
- spermatorrhea — abnormally frequent and involuntary nonorgasmic emission of semen.
- spermatotoxic — spermotoxic.
- spermatotoxin — spermotoxin.
- sphagnicolous — growing in moss
- sphagnologist — a person who studies sphagna
- sphagnum moss — Botany
- spinal column — the series of vertebrae in a vertebrate animal forming the axis of the skeleton and protecting the spinal cord; spine; backbone.
- splanchnocele — a primitive embryonic body cavity
- splanchnology — the visceral system
- splenial bone — a small bone in the lower jaw of some animals, such as reptiles and birds
- spoiler party — a third political party formed to draw votes away from one of the two major parties, thus spoiling its chance of winning an election.
- spokesmanship — the office or skilful use of the office of spokesman
- spontaneities — the exhibiting of actions, impulses, or behaviour that are stimulated by internal processes
- spontaneously — coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned: a spontaneous burst of applause.
- sporting lady — a prostitute.
- sports jacket — a jacket, often of textured wool or colorful pattern, with a collar, lapels, long sleeves, and buttons in the front, cut somewhat fuller than the jacket of a business suit, worn with slacks for informal occasions.
- sportscasting — the reporting of a sports event by radio or television broadcast.
- sportsmanlike — a man who engages in sports, especially in some open-air sport, as hunting, fishing, racing, etc.
- sportsmanship — the character, practice, or skill of a sportsman.
- spotted adder — milk snake.
- spotted crake — a Eurasian rail, Porzana porzana, of swamps and marshes, having a buff speckled plumage and dark brown wings
- spotted hyena — a long-legged carnivorous doglike mammal native to Africa and S Asia (Crocuta crocuta)
- spotter plane — an aircraft used in observing enemy movements or the accuracy of fire on a target
- spread option — spread (def 25b).
- spring-loaded — (of a machine part) kept normally in a certain position by a spring: a spring-loaded safety valve.
- springboarded — a flexible board, projecting over water, from which divers leap or spring.
- standing chop — (in an axemen's competition) a chop with the log standing upright
- standing crop — the totality of living things in an ecosystem at a given time.
- starting post — the upright pole marking the beginning of a racecourse
- state capitol — the building which houses the government of a state
- state of play — current situation
- state trooper — a member of a U.S. state police force.
- status report — statement or update
- staying power — ability or strength to last or endure; endurance; stamina.
- steganography — the practice of concealing messages in such a way that only the sender and the recipient know that there is a message
- steganopodous — belonging to the Stegandopodes or having all four toes webbed together
- stenopetalous — having narrow petals.
- step aerobics — a set of aerobic exercises designed to improve the cardiovascular system, which consists of stepping on and off a special box of adjustable height
- stereographer — a person who takes stereoscopic photographs.
- stereotypical — a process, now often replaced by more advanced methods, for making metal printing plates by taking a mold of composed type or the like in papier-mâché or other material and then taking from this mold a cast in type metal.
- stock company — Finance. a company or corporation whose capital is divided into shares represented by stock.
- stomach upset — a slight illness affecting your stomach and/or bowels characterized by nausea, vomiting and/or diarrhoea
- stomatoplasty — plastic surgery of the mouth or the cervix.