20-letter words containing s, t, y, l, a, r
- silicon tetrahydride — silane (def 1).
- small craft advisory — a U.S. National Weather Service advisory of sustained winds, over coastal and inland waters, with speeds of 20–33 knots (23–38 mph, 10–17 m/sec). Regional NWS offices have discretion over the choice of the lower limit.
- social security card — a card that contains details of a person's social security number
- software methodology — (programming) The study of how to navigate through each phase of the software process model (determining data, control, or uses hierarchies, partitioning functions, and allocating requirements) and how to represent phase products (structure charts, stimulus-response threads, and state transition diagrams).
- solitary confinement — the confinement of a prisoner in a cell or other place in which he or she is completely isolated from others.
- south orkney islands — an uninhabited group of islands in the S Atlantic, southeast of Cape Horn: formerly a dependency of the Falkland Islands; part of the British Antarctic Territory since 1962 (claims are suspended under the Antarctic Treaty). Area: 621 sq km (240 sq miles)
- spanish oyster plant — a composite plant, Scolymus hispanicus, of southern Europe, having spiny, thistlelike leaf margins, small yellow flowers, and an edible root.
- state highway patrol — a state's road traffic police
- subscription library — a commercial lending library
- supplementary angles — either of two angles that added together produce an angle of 180°.
- surveillance society — a society where surveillance technology is widely used to monitor people's everyday activities
- system international — Système International d'Unités
- systemic circulation — the circulatory system in general.
- the canterbury tales — an uncompleted sequence of tales by Chaucer, written for the most part after 1387.
- the whole nine yards — everything that is required; the whole thing
- thirty-nine articles — a set of formulas defining the doctrinal position of the Church of England, drawn up in the 16th century, to which the clergy are required to give general consent
- three-dimensionality — having, or seeming to have, the dimension of depth as well as width and height.
- treaty of versailles — the treaty of 1919 imposed upon Germany by the Allies (except for the US and the Soviet Union): the most important of the five peace treaties that concluded World War I
- uncharacteristically — Also, characteristical. pertaining to, constituting, or indicating the character or peculiar quality of a person or thing; typical; distinctive: Red and gold are the characteristic colors of autumn.
- upper yosemite falls — a section of Yosemite Falls in central California, in the Yosemite National Park that is 436 m (1430 ft) high
- voluntary euthanasia — the act of killing someone painlessly, esp to relieve suffering from an incurable illness, with their consent
- westminster assembly — a convocation that met at Westminster, London, 1643–49, and formulated the articles of faith (Westminster Confession of Faith) that are accepted as authoritative by most Presbyterian churches.
- winter olympic games — an international contest of winter sports, esp skiing, held every four years
- yellow-breasted chat — an American warbler, Icteria virens, having a yellow throat and breast and greenish-brown upper parts and noted for imitating the songs of other species.