grievance
     n 1: a resentment strong enough to justify retaliation; "holding
          a grudge"; "settling a score" [syn: {grudge}, {score}]
     2: an allegation that something imposes an illegal obligation
        or denies some legal right or causes injustice
     3: a complaint about a (real or imaginary) wrong that causes
        resentment and is grounds for action
Source: WordNet® 2.0