The Collaborative International Dictionary of English v.0.48:

Forbearance \For*bear"ance\, n.
   The act of forbearing or waiting; the exercise of patience.
   [1913 Webster]

         He soon shall find
         Forbearance no acquittance ere day end.  --Milton.
   [1913 Webster]

   2. The quality of being forbearing; indulgence toward
      offenders or enemies; long-suffering.
      [1913 Webster]

            Have a continent forbearance, till the speed of his
            rage goes slower.                     --Shak.

   Syn: Abstinence; refraining; lenity; mildness.
        [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

132 Moby Thesaurus words for "forbearance":
   abandonment, abeyance, abjuration, abjurement, abnegation,
   acceptance, avoidance, avoiding reaction, benevolence, cessation,
   charitableness, charity, circumvention, clemency, clementness,
   cold storage, commiseration, compassion, condolence, condonation,
   constraint, defense mechanism, denial, desistance, discontinuance,
   disregard, dodge, duck, easiness, easygoingness, elusion,
   elusiveness, endurance, equivocation, escape, evasion,
   evasive action, evasiveness, favor, feeling, forbearing,
   forbearingness, forestalling, forestallment, forgiveness,
   forgivingness, fortitude, frugality, generousness, gentleness,
   getting around, golden mean, grace, humaneness, humanity,
   indulgence, jink, kindness, laxness, lenience, leniency,
   lenientness, lenity, long-sufferance, long-suffering, longanimity,
   magnanimity, mercifulness, mercy, mildness, mitigation,
   moderateness, moderation, neutrality, nonexercise, nonintervention,
   noninvolvement, nothing in excess, overlooking, pardon, pathos,
   patience, patience of Job, patientness, permissiveness,
   perseverance, pity, prevention, quarter, refraining, relief,
   relinquishment, renouncement, renunciation, reprieve, resignation,
   restraint, ruth, self-control, self-denial, self-discipline,
   self-mastery, self-pity, self-restraint, shunning, shunting off,
   shy, sidestep, sidetracking, slip, soberness, sobriety, softness,
   sophrosyne, stoicism, sufferance, suspension, sweet reasonableness,
   sympathy, temperance, temperateness, tenderness, the runaround,
   thoughtful, tolerance, toleration, uncomplainingness,
   unrevengefulness, waiting game, waiting it out, waiver, zigzag