The Collaborative International Dictionary of English v.0.48:

Stout-hearted \Stout"-heart`ed\ (stout"h[aum]rt`[e^]d), a.
   Having a brave heart; courageous. -- Stout"-heart`ed*ness,
   n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stouthearted
    adj 1: used especially of persons; "a stalwart knight"; "a
           stouthearted fellow who had an active career in the army"
           [syn: stalwart, stouthearted]

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "stouthearted":
   bestow, bold, bold-spirited, brave, chivalric, chivalrous,
   courageous, doughty, gallant, greathearted, hardy, heroic,
   herolike, intrepid, ironhearted, knightlike, knightly, lionhearted,
   manful, manly, pack, soldierlike, soldierly, stalwart, store,
   stout, valiant, valorous, warehouse