bear on vs sustain

bear on and sustain both are verbs.

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

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

bear on (verb)	sustain (verb)
have an effect upon	undergo (as of injuries and illnesses)
press, drive, or impel (someone) to action or completion of an action	establish or strengthen as with new evidence or facts
be relevant to	admit as valid
keep or maintain in unaltered condition; cause to remain or last	supply with necessities and support
	provide with nourishment
	be the physical support of; carry the weight of
	lengthen or extend in duration or space