erupt vs combust

erupt and combust both are verbs.

Word	Noun	Adjective	Verb	Adverb
erupt	No	No	Yes	No
combust	No	No	Yes	No

As verbs, erupt and combust are synonyms defined as:

Other synonyms of erupt include catch fire, conflagrate, ignite, take fire.

erupt (verb)	combust (verb)
become active and spew forth lava and rocks	undergo combustion
start abruptly	get very angry and fly into a rage
erupt or intensify suddenly	cause to become violent or angry
become raw or open	start to burn or burst into flames
break out	cause to burn or combust
appear on the skin
force out or release suddenly and often violently something pent up
start to burn or burst into flames