caballo

from The Collaborative International Dictionary of English v.0.48

Caballo \Ca*bal"lo\ (k[.a]*v[aum]l"y[-o]; 220), n. [Written also
   {cavallo}.] [Sp., fr. L. caballus a nag. See {Cavalcade}.]
   A horse. [Sp. Amer.]
   [Webster 1913 Suppl.]

from U.S. Gazetteer (1990)

Caballo, NM
  Zip code(s): 87931