The Collaborative International Dictionary of English v.0.48:

Morale \Mo`rale"\, n. [F. See Moral, a.]
   The moral condition, or the condition in other respects, so
   far as it is affected by, or dependent upon, moral
   considerations, such as zeal, spirit, hope, and confidence;
   mental state, as of a body of men, an army, and the like.
   [1913 Webster]

WordNet (r) 3.0 (2006):

morale
    n 1: a state of individual psychological well-being based upon a
         sense of confidence and usefulness and purpose
    2: the spirit of a group that makes the members want the group
       to succeed [syn: esprit de corps, morale, team spirit]

Moby Thesaurus II by Grady Ward, 1.0:

102 Moby Thesaurus words for "morale":
   angelicalness, assurance, attitude, bipartisanship, coaction,
   coadjuvancy, coadministration, coagency, cochairmanship,
   codirectorship, collaboration, collaborativeness, collectivism,
   collusion, commensalism, common effort, common enterprise,
   communalism, communism, communitarianism, community, complicity,
   concert, concord, concordance, concurrence, confidence,
   cooperation, cooperativeness, cue, dedication, disposition, drive,
   duet, duumvirate, ecumenicalism, ecumenicism, ecumenism, esprit,
   esprit de corps, ethicality, ethicalness, fellow feeling,
   fellowship, frame, frame of mind, godliness, goodness, harmony,
   heart, humor, joining of forces, joint effort, joint operation,
   mass action, mind, mood, moral rectitude, morality, morals,
   mutual assistance, mutualism, mutuality, note, octet, pooling,
   pooling of resources, probity, pulling together, quartet, quintet,
   reciprocity, rectitude, right conduct, righteousness,
   saintlikeness, saintliness, self-confidence, self-esteem,
   self-possession, septet, sextet, solidarity, spirit, spirits,
   state of mind, symbiosis, synergism, synergy, team spirit,
   teamwork, temper, tone, trio, triumvirate, troika, united action,
   unity, vein, vigor, virtue, virtuousness