concentrate on vs refer

concentrate on and refer both are verbs.

Word	Noun	Adjective	Verb	Adverb
concentrate on	No	No	Yes	No
refer	No	No	Yes	No

As verbs, refer is a hypernym of concentrate on; that is, refer is a word with a broader meaning than concentrate on:

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

concentrate on (verb)	refer (verb)
center upon	think of, regard, or classify under a subsuming principle or with a general group or in relation to another
	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