15-letter words containing s, w, i
- saskatchewanian — a native or inhabitant of Saskatchewan
- satin bowerbird — the largest Australian bowerbird, Ptilonorhynchus violaceus, the male of which has lustrous blue plumage
- saw-edged knife — a knife with a serrated edge
- seaside sparrow — a species of sparrow, Ammospiza maritima, existing in two subspecies, one (Cape Sable seaside sparrow) having dark olive-drab plumage with a lighter breast and underbelly, and the other (dusky seaside sparrow) having bold black and white markings on the breast and underbelly: the dusky seaside sparrow is almost extinct.
- seidlitz powder — a laxative consisting of two powders, tartaric acid and a mixture of sodium bicarbonate and Rochelle salt (sodium potassium tartrate)
- self-worthiness — the sense of one's own value or worth as a person; self-esteem; self-respect.
- senior wrangler — (at Cambridge University) a candidate who has obtained first-class honours in Part II of the mathematics tripos and got the highest marks
- sewage disposal — waste processing
- shadow minister — a member of the main opposition party in Parliament who would hold ministerial office if their party were in power
- share ownership — the owning of shares in a company
- shortwave radio — a radio that transmits or receives shortwaves.
- shotgun wedding — a wedding occasioned or precipitated by pregnancy.
- shrink-wrapping — a flexible plastic wrapping designed to shrink about its contours to protect and seal something
- sidewalk artist — an artist who draws pictures on the sidewalk, especially with colored chalk, as a means of soliciting money from passers-by.
- silicified wood — wood that has been changed into quartz by a replacement of the cellular structure of the wood by siliceous waters.
- sit-down strike — a strike during which workers occupy their place of employment and refuse to work or allow others to work until the strike is settled.
- sneezing powder — a powder used to make people sneeze as a practical joke
- snowy mountains — a mountain range in SE Australia, part of the Australian Alps: famous hydroelectric scheme
- solenoid switch — A solenoid switch is an electrical switch that is often used where a high current circuit, such as a starter motor circuit, is brought into operation by a low current switch.
- south kingstown — a town in S central Rhode Island.
- south milwaukee — a city in SE Wisconsin.
- sparkling water — soda water (def 1).
- spawning ground — a place where fish deposit their eggs for fertilization
- spirit wrestler — a Doukhobor.
- spirits of wine — alcohol (def 1).
- stacking swivel — a metal swivel attached to the stock of a military rifle for use in hooking three rifles together to form a stack.
- stalactite work — (in Islamic architecture) intricate decorative corbeling in the form of brackets, squinches, and portions of pointed vaults.
- stand in awe of — to respect and fear
- starfish flower — carrion flower (def 2).
- stationary wave — standing wave.
- stephen hawking — Stephen William, born 1942, English mathematician and theoretical physicist.
- stillson wrench — a large wrench having adjustable jaws that tighten as the pressure on the handle is increased
- stoke newington — former metropolitan borough of London, now part of Hackney
- straightforward — going or directed straight ahead: a straightforward gaze.
- strawberry dish — a shallow, circular fruit dish with a fluted or pierced border.
- streamline flow — the flow of a fluid past an object such that the velocity at any fixed point in the fluid is constant or varies in a regular manner.
- subminimum wage — See example at subminimum (def 1).
- swainson's hawk — a migratory hawk, Buteo swainsoni, of western North America, that winters in southern South America.
- swamp white oak — an oak, Quercus bicolor, of eastern North America, yielding a hard, heavy wood used in shipbuilding, for making furniture, etc.
- sweating system — the practice of employing workers in sweatshops.
- swedish massage — a massage employing techniques of manipulation and muscular exercise systematized in Sweden in the 19th century.
- swimming trunks — men's swimsuit shorts
- swing both ways — to enjoy sexual partners of both sexes
- swinging single — an unmarried person who is sexually promiscuous
- swiss army code — (programming, humour) Code for an application that is suffering from feature creep. Swiss Army Code does many things, but does none of them well.
- symphony writer — a composer of an extended large-scale orchestral composition, usually with several movements, at least one of which is in sonata form
- synod of whitby — the synod held in 664 at Whitby at which the Roman date for Easter was accepted and the Church in England became aligned with Rome
- take issue with — disagree with
- thankworthiness — the state or quality of being thankworthy or deserving thanks
- the cesarewitch — a long-distance horserace run each year in October at Newmarket racecourse