acescency
acid
acidity
acidness
acidulousness
acridity
acridness
acrimony
animosity
asperity
astringence
astringency
bile
bite
bitingness
bitter pill
bitter resentment
bitterness
bitterness of spirit
causticity
causticness
choler
corrosiveness
crabbedness
cuttingness
dourness
dryness
edge
fierceness
gall
gall and wormwood
gnashing of teeth
greenness
grip
hard feelings
harshness
heartburning
hyperacidity
incisiveness
keenness
mordacity
mordancy
piercingness
piquancy
poignancy
point
pungency
rancor
rankling
rigor
bitter
disagreeableness
sour
sourness
alkalinity
belligerence
crispness
crossness
discourtesy
dogmatism
hastiness
haughtiness
hoarseness
imperiousness
misanthropy
morbidness
sallowness
saltness
smugness
surliness
tartness
voluptuousness