nudge vs bear on

nudge is a noun but bear on is not a noun.

Word	Noun	Adjective	Verb	Adverb
nudge	Yes	No	Yes	No
bear on	No	No	Yes	No

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

nudge: push into action by pestering or annoying gently
bear on: press, drive, or impel (someone) to action or completion of an action

Other hypernyms of nudge include push.

nudge (noun)	bear on (noun)
a slight push or shake

nudge (verb)	bear on (verb)
push into action by pestering or annoying gently	have an effect upon
to push against gently	press, drive, or impel (someone) to action or completion of an action
	be relevant to
	keep or maintain in unaltered condition; cause to remain or last