refer vs revolve around

refer and revolve around both are verbs.

Word	Noun	Adjective	Verb	Adverb
refer	No	No	Yes	No
revolve around	No	No	Yes	No

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

refer (verb)	revolve around (verb)
think of, regard, or classify under a subsuming principle or with a general group or in relation to another	move around in a circular motion
have as a meaning	center upon
make reference to
use a name to designate
seek information from
send or direct for treatment, information, or a decision
be relevant to