dredge up vs mention

dredge up is not a noun while mention is a noun.

Word	Noun	Adjective	Verb	Adverb
dredge up	No	No	Yes	No
mention	Yes	No	Yes	No

As verbs, mention is a hypernym of dredge up; that is, mention is a word with a broader meaning than dredge up:

Other hypernyms of dredge up include advert, bring up, cite, name, refer.

dredge up (noun)	mention (noun)
	an official recognition of merit
	a remark that calls attention to something or someone
	a short note recognizing a source of information or of a quoted passage

dredge up (verb)	mention (verb)
mention something unpleasant from the past	make mention of
	commend
	make reference to