acerbity
acid
acidity
acidulousness
acrimony
animus
antagonism
antipathy
asperity
bad blood
bad feeling
bile
bitter feeling
bitter resentment
bitterness
bitterness of spirit
causticity
choler
contempt
detestation
disaffinity
enmity
feud
gall
gnashing of teeth
hard feelings
hardheartedness
hatred
heartburning
hostility
ill blood
ill feeling
ill will
ill-will
immediate dislike
loathing
malevolence
malice
opposition
personality conflict
rancor
rankling
resentment
slow burn
soreness
sourness
spleen
animose
contention
discontent
hate
injustice
irritation
jealousy
misunderstanding
prejudice
rancour
rivalry
atrocity
curiosity
ferocity
generosity
monstrosity
religiosity
velocity
viscosity
peace