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):

faintheartedness
    n 1: the trait of lacking boldness and courage; "faintness of
         heart and infirmity of purpose" [syn: faintheartedness,
         faintness] [ant: stoutheartedness]