Collocations for justification - noun

considerable, every, some
You have every justification for feeling angry.

the slightest
She had not given him the slightest justification for thinking she was interested in him.

ample, sufficient | ethical, moral | intellectual, rational, theoretical | legal, political

give (sb), provide (sb with)
She''s unable to provide any justification for her actions.

see

in ~
the argument which he put forward in justification

with ~
He felt, with some justification, that he had been unfairly treated.

without ~
She was arrested entirely without justification.

~ for
I can see some justification for her remarks.