1) Aggressiveness 2) Belligerence 3) Combativeness 4) Contentiousness 5) Disagreeableness 6) Eagerness to fight 7) French word used in English 8) Quarrelsomeness Found on https://www.crosswordclues.com/clue/pugnacity
Pug·nac'i·ty noun [ Latin pugnacitas : confer French pugnacité .] Inclination or readiness to fight; quarrelsomeness. ' A national pugnacity of character.' Motley. Found on http://www.encyclo.co.uk/webster/P/191