touch on vs bear upon

touch on and bear upon both are verbs.

Word	Noun	Adjective	Verb	Adverb
touch on	No	No	Yes	No
bear upon	No	No	Yes	No

As verbs, touch on and bear upon are synonyms defined as:

Other synonyms of touch on include affect, bear on, impact, touch.

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