impact vs bear upon

impact is a noun but bear upon is not a noun.

Word	Noun	Adjective	Verb	Adverb
impact	Yes	No	Yes	No
bear upon	No	No	Yes	No

As verbs, impact and bear upon are synonyms defined as:

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

impact (noun)	bear upon (noun)
influencing strongly
the violent interaction of individuals or groups entering into combat
the striking of one body against another
a forceful consequence; a strong effect

impact (verb)	bear upon (verb)
have an effect upon	have an effect upon
press or wedge together; pack together