Collocations for bitterness - noun

considerable, deep, great, real
lingering

edge, hint, touch, trace

feel
She feels no bitterness towards/toward him.

express, show
He's never shown any bitterness.

hide
She smiled and tried to hide her bitterness.

cause, create

with bitterness, without bitterness
She spoke slowly and with some bitterness.

bitterness about, bitterness over
their bitterness over the strike

bitterness against, bitterness towards/toward
his bitterness towards/toward his own father

bitterness among
the bitterness among nurses about this pay deal

bitterness between
There is no bitterness between them.

bitterness in
The bitterness in her voice was evident.