urge vs bear on

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

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

As verbs, bear on is a hyponym of urge; that is, bear on is a word with a more specific, narrower meaning than urge:

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

Other hyponyms of urge include hurry, rush, push, advocate, preach.

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

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