bear on vs hold on

bear on and hold on both are verbs.

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

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

bear on (verb)	hold on (verb)
have an effect upon	be persistent, refuse to stop
press, drive, or impel (someone) to action or completion of an action	stop and wait, as if awaiting further instructions or developments
be relevant to	hold the phone line open
keep or maintain in unaltered condition; cause to remain or last	hold firmly
	retain possession of