13-letter words containing s, p, o, n, g
- springboarded — a flexible board, projecting over water, from which divers leap or spring.
- spurious wing — alula (def 1).
- 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
- 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
- steppingstone — a stone, or one of a line of stones, in shallow water, a marshy place, or the like, that is stepped on in crossing.
- stork parking — spaces reserved in a parking lot for cars driven by pregnant women or new mothers.
- superorganism — a form of life composed of mutually interdependent parts that maintain various vital processes.
- superregional — involving many regions
- supersurgeons — highly skilled surgeon
- swimming pool — a tank or large artificial basin, as of concrete, for filling with water for swimming.
- taphrogenesis — the process of forming rifts, resulting in regional faulting and subsidence
- torsion group — a group in which every element has finite order.
- trainspotting — hobby: observing trains
- unprogressive — favoring or advocating progress, change, improvement, or reform, as opposed to wishing to maintain things as they are, especially in political matters: a progressive mayor.
- unpromisingly — in a manner that is not showing any promise of favourable development or future success
- volute spring — a coil spring, conical in shape, extending in the direction of the axis of the coil.
- watering spot — watering hole
- weapons-grade — Weapons-grade substances such as uranium or plutonium are of a quality which makes them suitable for use in the manufacture of nuclear weapons.
- whipping post — a post to which persons are tied to undergo whipping as a legal penalty.
- women's group — A women's group is a group of women who meet regularly, usually in order to organize campaigns.
- workingperson — a workingman or workingwoman.
- zoosporangium — a sporangium or spore case in which zoospores are produced.
- zygosporangia — a sporangium that bears a zygospore.