refer vs cross-refer

refer and cross-refer both are verbs.

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

As verbs, cross-refer is a hyponym of refer; that is, cross-refer is a word with a more specific, narrower meaning than refer:

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

refer (verb)	cross-refer (verb)
think of, regard, or classify under a subsuming principle or with a general group or in relation to another	refer from one entry to another, as in catalogues, books, and lists
have as a meaning
make reference to
use a name to designate
seek information from
send or direct for treatment, information, or a decision
be relevant to