bear on vs urge

bear on is not a noun while urge is a noun.

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

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

bear on: press, drive, or impel (someone) to action or completion of an action
urge: force or impel in an indicated direction

Other hypernyms of bear on include exhort, press, urge on.

bear on (noun)	urge (noun)
	a strong restless desire
	an instinctive motive

bear on (verb)	urge (verb)
have an effect upon	force or impel in an indicated direction
press, drive, or impel (someone) to action or completion of an action	spur on or encourage especially by cheers and shouts
be relevant to	push for something
keep or maintain in unaltered condition; cause to remain or last