13-letter words containing o, i, l, s, a
- unfashionably — in an unfashionable manner
- unmaliciously — not in a malicious manner
- unmetabolised — not metabolised
- unscholarlike — not befitting a scholar; ungentlemanly
- unsensational — not sensational
- unwomanliness — the quality or state of being unwomanly
- ustilagineous — belonging to the Ustilaginales, an order of fungi that cause plant disease
- vaccinologist — the science of vaccine development.
- variable cost — a cost that varies with a change in the volume of output while remaining uniform on a per-unit basis, as cost of labor (distinguished from fixed cost).
- vashon island — an island in Puget Sound, W central Washington, between Seattle and Tacoma. 37 sq. mi. (96 sq. km).
- vasostimulant — stimulating the action of the vasomotor nerves.
- visual cortex — the portion of the cerebral cortex of the brain that receives and processes impulses from the optic nerves.
- visual foxpro — (database) A Microsoft database derived from Fox Software's FoxPRO.
- visualization — to recall or form mental images or pictures.
- vocationalism — the practice or policy of requiring vocational training of all college or high-school students.
- vocationalist — the practice or policy of requiring vocational training of all college or high-school students.
- volcanologist — the scientific study of volcanoes and volcanic phenomena.
- voluntariness — done, made, brought about, undertaken, etc., of one's own accord or by free choice: a voluntary contribution.
- voluntaristic — Philosophy. any theory that regards will as the fundamental agency or principle, in metaphysics, epistemology, or psychology.
- wages council — (formerly, in Britain) a statutory body empowered to fix minimum wages in an industry; abolished in 1994
- wagon soldier — a field-artillery soldier.
- walking horse — Tennessee walking horse.
- wallcoverings — Plural form of wallcovering.
- walter piston — Walter, 1894–1976, U.S. composer.
- water soldier — an aquatic plant, Stratiotes aloides, of Europe and NW Asia, having rosettes of large leaves and large three-petalled white flowers: family Hydrocharitaceae
- watercolorist — a pigment for which water and not oil is used as the vehicle.
- wellingtonias — Plural form of wellingtonia.
- west columbia — a town in central South Carolina.
- whitlow grass — any of various plants of the genera Draba and Erophila, once thought to cure whitlows: family Brassicaceae (crucifers)
- wholistically — Alternative form of holistically.
- winston-salem — a city in N North Carolina.
- wool classing — the grading and grouping together of similar types of wool
- words fail me — I am too happy, sad, amazed, etc, to express my thoughts
- working class — those persons working for wages, especially in manual labor.
- world-shaking — of sufficient size or importance to affect the entire world: the world-shaking effects of an international clash.
- xiphiplastron — the fourth lateral plate of a turtle's plastron