The Collaborative International Dictionary of English v.0.48:

Faint-hearted \Faint"-heart`ed\, a.
   Wanting in courage; depressed by fear; easily discouraged or
   frightened; cowardly; timorous; dejected.
   [1913 Webster]

         Fear not, neither be faint-hearted.      --Is. vii. 4.
   -- Faint"-heart`ed*ly, adv. -- Faint"-heart`ed*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fainthearted
    adj 1: lacking conviction or boldness or courage; "faint heart
           ne'er won fair lady" [syn: faint, fainthearted,
           timid, faint-hearted]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "faint-hearted":
   afraid, chicken, cowardly, diffident, faint, feckless, feeble,
   frightened, ineffectual, irresolute, lily-livered, puny,
   pusillanimous, scared, shy, timid, timorous, weak, white-livered



Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "fainthearted":
   abulic, afraid, chicken, chickenhearted, coward, cowardly, cowed,
   daunted, dismayed, faint, fearful, feeble, feebleminded, frail,
   funking, funky, henhearted, infirm, intimidated, invertebrate,
   lily-livered, milk-livered, milksoppish, milksoppy, mousy,
   overtimid, overtimorous, panic-prone, panicky, pigeonhearted,
   pliable, rabbity, sissified, sissy, soft, spineless, timid,
   timorous, unmanly, unmanned, weak, weak-kneed, weak-minded,
   weak-willed, weakhearted, white-livered, yellow