The Collaborative International Dictionary of English v.0.48:

Courageous \Cour*a"geous\ (k?r-?"j?s), a. [F. courageux.]
   Possessing, or characterized by, courage; brave; bold.
   [1913 Webster]

         With this victory, the women became most courageous and
         proud, and the men waxed . . . fearful and desperate.
                                                  --Stow.

   Syn: Gallant; brave; bold; daring; valiant; valorous; heroic;
        intrepid; fearless; hardy; stout; adventurous;
        enterprising. See Gallant.
        [1913 Webster]

WordNet (r) 3.0 (2006):

courageous
    adj 1: possessing or displaying courage; able to face and deal
           with danger or fear without flinching; "Familiarity with
           danger makes a brave man braver but less daring"- Herman
           Melville; "a frank courageous heart...triumphed over
           pain"- William Wordsworth; "set a courageous example by
           leading them safely into and out of enemy-held territory"
           [syn: brave, courageous] [ant: cowardly, fearful]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "courageous":
   audacious, bold, bold-spirited, brave, chivalric, chivalrous,
   daring, dauntless, doughty, fearless, fiery, gallant, game,
   greathearted, gritty, gutsy, gutty, hardy, heroic, herolike,
   high-spirited, intrepid, ironhearted, knightlike, knightly,
   lionhearted, manful, manly, mettlesome, plucky, soldierlike,
   soldierly, spunky, stalwart, stout, stouthearted, strong,
   tenacious, unafraid, undaunted, valiant, valorous