go up vs bear down on

go up and bear down on both are verbs.

Word	Noun	Adjective	Verb	Adverb
go up	No	No	Yes	No
bear down on	No	No	Yes	No

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

Other hyponyms of go up include drive up, bear down upon, edge in, edge up, close, crowd, push.

go up (verb)	bear down on (verb)
increase in value or to a higher point	exert a force with a heavy weight
burn completely; be consumed or destroyed by fire	sail towards another vessel, of a ship
move upward
go upward with gradual or continuous progress
be erected, built, or constructed
move towards
travel up