intumesce vs bubble up

intumesce and bubble up both are verbs.

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

As verbs, intumesce and bubble up are synonyms defined as:

intumesce and bubble up: move upwards in bubbles, as from the effect of heating; also used metaphorically

intumesce (verb)	bubble up (verb)
expand abnormally	move upwards in bubbles, as from the effect of heating; also used metaphorically
move upwards in bubbles, as from the effect of heating; also used metaphorically