cross-refer vs mention

cross-refer is not a noun while mention is a noun.

Word	Noun	Adjective	Verb	Adverb
cross-refer	No	No	Yes	No
mention	Yes	No	Yes	No

As verbs, mention is a hypernym of cross-refer; that is, mention is a word with a broader meaning than cross-refer:

cross-refer: refer from one entry to another, as in catalogues, books, and lists
mention: make reference to

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

cross-refer (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

cross-refer (verb)	mention (verb)
refer from one entry to another, as in catalogues, books, and lists	make mention of
	commend
	make reference to