refer vs have to do with

refer and have to do with both are verbs.

Word	Noun	Adjective	Verb	Adverb
refer	No	No	Yes	No
have to do with	No	No	Yes	No

As verbs, refer and have to do with are synonyms defined as:

Other synonyms of refer include bear on, come to, concern, pertain, relate, touch, touch on.

refer (verb)	have to do with (verb)
think of, regard, or classify under a subsuming principle or with a general group or in relation to another	be relevant to
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