revamp vs touch on

revamp and touch on both are verbs.

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

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

revamp: provide (a shoe) with a new vamp
touch on: restore by replacing a part or putting together what is torn or broken

Other hypernyms of revamp include bushel, doctor, fix, furbish up, mend, repair, restore.

revamp (verb)	touch on (verb)
to patch up or renovate; repair or restore	restore by replacing a part or putting together what is torn or broken
provide (a shoe) with a new vamp	have an effect upon
	refer to or discuss briefly
	be relevant to