overhaul vs touch on

overhaul is a noun but touch on is not a noun.

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

overhaul (noun)	touch on (noun)
periodic maintenance on a car or machine
the act of improving by renewing and restoring

overhaul (verb)	touch on (verb)
make repairs, renovations, revisions or adjustments to	restore by replacing a part or putting together what is torn or broken
travel past	have an effect upon
	refer to or discuss briefly
	be relevant to