rise up vs bubble up

rise up and bubble up both are verbs.

Word	Noun	Adjective	Verb	Adverb
rise up	No	No	Yes	No
bubble up	No	No	Yes	No

As verbs, bubble up is a hyponym of rise up; that is, bubble up is a word with a more specific, narrower meaning than rise up:

rise up: come to the surface
bubble up: move upwards in bubbles, as from the effect of heating; also used metaphorically

Other hyponyms of rise up include emerge, resurface, intumesce, swell, well.

rise up (verb)	bubble up (verb)
come to the surface	move upwards in bubbles, as from the effect of heating; also used metaphorically
stand up on the hind legs, of quadrupeds
take part in a rebellion; renounce a former allegiance