The Collaborative International Dictionary of English v.0.48:

Carabineer \Car`a*bi*neer"\ (k[a^]r`[.a]*b[i^]*n[=e]r"), n.
   A carbineer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

carabineer
    n 1: a soldier (historically a mounted soldier) who is armed
         with a carbine [syn: carbineer, carabineer,
         carabinier]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "carabineer":
   Nimrod, Zouave, archer, artilleryman, bersagliere, bowman,
   cannoneer, chasseur, crack shot, dead shot, deadeye, dogface,
   doughfoot, expert rifleman, foot soldier, footslogger, fusileer,
   good shot, grenadier, grunt, gun, gunman, gunner, hunter,
   infantryman, light infantryman, marksman, markswoman, musketeer,
   paddlefoot, rifle, rifleman, sharpshooter, shooter, shot, sniper,
   targetshooter, toxophilite, trapshooter