Smoot

n.

  1. (Britain) A small opening built into a dry-stone wall to allow sheep (and hares) to pass through
  2. (humorous, chiefly Greater Boston) A unit of length defined as exactly sixty-seven inches (approximately 1.70 meters), based upon the height of Oliver R. Smoot, who lay on the Harvard Bridge to measure it as an MIT fraternity prank

[Wiktionary, while looking up thirl]

Spandrel

the almost triangular space between one side of the outer curve of an arch, a wall, and the ceiling or framework.
  • the space between the shoulders of adjoining arches and the ceiling or molding above.

Spavined

adj.

  1. affected with spavin
  2. old and decrepit

spavin (noun)

  1. swelling, esp. a bony enlargement of the hock of a horse associated with strain

[Attrib. — Eley Williams]

Stertorous

adj.

  1. Of breathing, noisy or labored.

[The Waves — Virginia Woolf]

Sycorax

Proper noun
  1. A natural satellite of the planet Uranus
OriginNamed after Caliban’s mother in William Shakespeare’s play The Tempest.