acerbity
acid
acidity
acidulousness
acrimony
animosity
animus
antagonism
antipathy
asperity
bad blood
bad feeling
bile
bitter feeling
bitter resentment
bitterness
bitterness of spirit
causticity
choler
enmity
feud
gall
gnashing of teeth
grudge
grudgefulness
hard feelings
hate
hatred
heartburning
hostility
ill blood
ill feeling
ill will
ill-will
implacability
implacableness
irreconcilableness
malevolence
malice
malignity
rankling
resentfulness
resentment
revengefulness
rancour
enviousness
envy
grievance
huffishness
score
sulkiness
rancid
alienation
antagonisms
discord
mistrust
repugnance
sarcasm
uncharitableness
vexation
vindictiveness
anchor
anker
banker
canker
danker
hanker
ranker
shanker
tanker