el testigo, la testigo - witness
  el trono - throne
  el talión - retribution
  la talla - size (especially of clothing),...
  el sabueso - bloodhound, detective, private...
  el sacacorchos - corkscrew
  el sondeo - nautical sounding; opinion poll; the...
  la sonrisa - smile
  el sopor - drowsiness, lethargy
  el sobretodo - overcoat, overalls
  el sobrino, la sobrina - nephew, niece
  la solapa - lapel; flap of a book or envelope
  la semejanza - similarity, likeness, resemblance
  el sabihondo, la sabihonda, el sabiondo, la sabionda - know-it-all, someone who knows...
  el susto - fright, scare
  salomónico - fair, equitable, wise, just
  el salpicadero - vehicle dashboard
  la salsa - sauce, gravy, salad dressing, salsa...
  la salvaguarda, la salvaguardia - safeguard, protection, security, backup
  sanativo - health-promoting, curative, healing