touch on vs cite

touch on is not a noun while cite is a noun.

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

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

Other hypernyms of touch on include advert, bring up, mention, name, refer.

touch on (noun)	cite (noun)
	a short note recognizing a source of information or of a quoted passage

touch on (verb)	cite (verb)
restore by replacing a part or putting together what is torn or broken	make reference to
have an effect upon	commend
refer to or discuss briefly	repeat a passage from
be relevant to	refer to for illustration or proof
	advance evidence for
	call in an official matter, such as to attend court
	refer to