revolve around vs touch on

revolve around and touch on both are verbs.

Word	Noun	Adjective	Verb	Adverb
revolve around	No	No	Yes	No
touch on	No	No	Yes	No

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

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

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