The Collaborative International Dictionary of English v.0.48:

Nares \Na"res\, n. pl. [L., pl. of naris nostril.] (Anat.)
   The nostrils or nasal openings, -- the anterior nares being
   the external or proper nostrils, and the posterior nares, the
   openings of the nasal cavities into the mouth or pharynx.
   [1913 Webster] Nargile

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "nares":
   antlia, beak, beezer, bill, bugle, conk, muffle, muzzle, neb, nib,
   nose, nostrils, nozzle, olfactories, olfactory area,
   olfactory cell, olfactory nerves, olfactory organ, olfactory pit,
   pecker, proboscis, rhinarium, rostrum, schnozzle, smeller, snoot,
   snout, trunk