unfriendliness (n.)

• aggression
• aggressiveness
• antagonism
• autism
• bashfulness
• bellicosity
• belligerence
• belligerency
• chauvinism
• chill
• chilliness
• coldness
• combativeness
• contentiousness
• coolness
• enmity
• ferocity
• fierceness
• fight
• frost
• hostility
• iciness
• incompatibility
• inhospitableness
• inhospitality
• jingoism
• militancy
• militarism
• moroseness
• pugnacity
• quarrelsomeness
• self-sufficiency
• strain
• sullenness
• tension
• truculence
• uncommunicativeness
• uncongeniality
• ungraciousness
• unneighborliness
• unsociability
• unsociableness
• warmongering
• warpath