Source : Webster's Revised Unabridged Dictionary (1913)

Quarrelsome \Quar"rel*some\, a.
   Apt or disposed to quarrel; given to brawls and contention;
   easily irritated or provoked to contest; irascible; choleric.

   Syn: Pugnacious; irritable; irascible; brawling; choleric;
        fiery; petulant. -- {Quar"rel*some*ly}, adv. --
        {Quar"rel*some*ness}, n.

Source : WordNet®

quarrelsomeness
     n : a disposition to fight [syn: {aggressiveness}, {contentiousness},
          {belligerence}, {pugnacity}]