center on vs touch on

center on and touch on both are verbs.

Word	Noun	Adjective	Verb	Adverb
center on	No	No	Yes	No
touch on	No	No	Yes	No

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

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

center on (verb)	touch on (verb)
center upon	restore by replacing a part or putting together what is torn or broken
have as a center	have an effect upon
	refer to or discuss briefly
	be relevant to