WordNet (r) 3.0 (2006):

call out
    v 1: utter aloud; often with surprise, horror, or joy; "`I won!'
         he exclaimed"; "`Help!' she cried"; "`I'm here,' the mother
         shouted when she saw her child looking lost" [syn:
         exclaim, cry, cry out, outcry, call out, shout]
    2: call out loudly, as of names or numbers
    3: challenge to a duel; "Aaron Burr called out Alexander
       Hamilton"

Moby Thesaurus II by Grady Ward, 1.0:

86 Moby Thesaurus words for "call out":
   affront, arouse, beard, bellow out, bid come, bid defiance, brave,
   bring forth, bring out, bring to light, call, call away, call back,
   call for, call forth, call in, call together, call up, challenge,
   cite, clamor, confront, conjure, conjure up, convene, convoke,
   cry out, dare, deduce, defy, demand, derive, double-dare, drag out,
   draw forth, draw out, educe, elicit, evoke, face, face out, front,
   get from, get out of, holler out, indent, induce, invoke,
   make an outcry, make an uproar, muster, muster up, obtain,
   order up, outcry, outdare, page, pipe up, preconize, procure,
   raise a clamor, recall, requisition, rouse, scream defiance,
   secure, send after, send for, serve, shout out, show fight,
   sing out, stare down, stimulate, subpoena, summon, summon forth,
   summon up, summons, vociferate, wangle, wangle out of, winkle out,
   worm out, worm out of, yell out