pertain vs refer

pertain and refer both are verbs.

Word	Noun	Adjective	Verb	Adverb
pertain	No	No	Yes	No
refer	No	No	Yes	No

As verbs, pertain and refer are synonyms defined as:

Other synonyms of pertain include bear on, come to, concern, have to do with, relate, touch, touch on.

pertain (verb)	refer (verb)
be a part or attribute of	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