catch fire vs light up

catch fire and light up both are verbs.

Word	Noun	Adjective	Verb	Adverb
catch fire	No	No	Yes	No
light up	No	No	Yes	No

As verbs, light up is a hyponym of catch fire; that is, light up is a word with a more specific, narrower meaning than catch fire:

Other hyponyms of catch fire include blow out, catch.

catch fire (verb)	light up (verb)
start to burn or burst into flames	introduce light into
	begin to smoke
	become clear
	start to burn with a bright flame
	ignite