ADJ
clear, easy, good
She finally felt an easy conscience after apologizing to her friend for the misunderstanding.
bad, guilty, terrible, troubled, uneasy
civic, moral, political, social
She felt a strong moral conscience about refusing to help her friend cheat on the test.
VERB + CONSCIENCE
have
She has a guilty conscience after forgetting her friend's birthday.
appease, ease, salve, soothe
He donated money to the charity to ease his conscience about not volunteering.
prick, trouble | appeal to, arouse, rouse, stir
wrestle with
She wrestled with her conscience before deciding whether to tell the truth.
CONSCIENCE + VERB
trouble sb
His conscience troubled him for years after he cheated on the test.
dictate sth
Her conscience dictated that she should tell the truth about what happened.
PREP
on your ~
He knew he had treated her badly, and it weighed heavily on his conscience.
PHRASES
a crisis of conscience, freedom of conscience, in (all/good) conscience
a matter of conscience
Whether to tell the truth was a matter of conscience for her.
a pang/prick/twinge of conscience
She felt a twinge of conscience after keeping the lost wallet instead of turning it in.
the voice of conscience
He finally heard the voice of conscience and decided to tell the truth about what happened.