Stallion

from WordNet (r) 3.0 (2006)

stallion
    n 1: uncastrated adult male horse [syn: {stallion}, {entire}]

from The Collaborative International Dictionary of English v.0.48

Stallion \Stal"lion\ (st[a^]l"y[u^]n), n. [OE. stalon, OF.
   estalon, F. ['e]talon, fr. OHG. stal a stable. See {Stall},
   n.]
   A male horse not castrated; a male horse kept for breeding.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

55 Moby Thesaurus words for "stallion":
      Houyhnhnm, billy, billy goat, boar, brood mare, bubbly-jock, buck,
      bull, bullock, chanticleer, charger, cock, cockerel, colt, courser,
      critter, dobbin, dog, drake, entire, entire horse, equine, filly,
      foal, gander, gelding, gobbler, hart, he-goat, horse, mare, mount,
      nag, peacock, prancer, ram, rooster, stag, steed, steer, stot,
      stud, studhorse, tarpan, tom, tom turkey, tomcat, top cow,
      top horse, tup, turkey gobbler, turkey-cock, war-horse, wether,
      wild horse