Definition of hostility :
1. An act of an open enemy; a hostile deed; especially in the plural, acts of warfare; attacks of an enemy.
2. State of being hostile; public or private enemy; unfriendliness; animosity.
repulsion, contentiousness, truculency, pugnaciousness, love, repugnance, disgust, bellicosity, truculence, abhorrence, animus, belligerency, belligerence, uncongeniality, aversion, militance, distaste, pugnacity, bellicoseness, ill will, attack, confrontation, detestation, aggressiveness, militancy
discordance (part of speech: noun)
conflict (part of speech: noun)
collision, strife, altercation, clamor, row, disharmony, dissonance, difference, imbroglio, discord, raucousness, clash, dissension, commotion, brawl, feud, dissidence, hassle, hubbub, riot, harshness, disagreement, squabble, cacophony, discordancy, squall
enmity (part of speech: noun)
contrariety, malice, coldness, bitterness, loathing, alienation, friction, combativeness, enmity, incompatibility, surliness, opposition, resentment, contention, dislike, coolness, spitefulness, conflict, tension, rancor, malevolence, wrath, bad blood, averseness, antipathy, polarity, inimicality, antagonism, unfriendliness, discordance, adverseness, quarrelsomeness, hard feelings, inharmoniousness, hatred, study at enmity, animosity
sullenness (part of speech: noun)
fretfulness, long-facedness, petulance, moodiness, sulkiness, dourness, cynicism, grumpiness, obstinacy, cantankerousness, sourness, glumness, irascibility, gloominess, crabbiness, meanness, darkness, moroseness, grouchiness, dejection, grimness, sullenness, crossness, contrariness, melancholy
warfare (part of speech: noun)
- It mattered not to him that he had to meet the open opposition of the saloon element and the secret hostility of those who depended upon that element for the success of their political schemes. - "The Doctor A Tale Of The Rockies", Ralph Connor.
- Otherwise, she must have been aware that such an answer from her would surely drive her friend's wife into open hostility. - "Can You Forgive Her?", Anthony Trollope.
- No serious hostility is displayed on either side. - "More Hunting Wasps", J. Henri Fabre.