catch on vs latch on

catch on and latch on both are verbs.

Word	Noun	Adjective	Verb	Adverb
catch on	No	No	Yes	No
latch on	No	No	Yes	No

As verbs, catch on and latch on are synonyms defined as:

catch on and latch on: understand, usually after some initial difficulty

Other synonyms of catch on include cotton on, get it, get onto, get wise, tumble, twig.

catch on (verb)	latch on (verb)
become popular	understand, usually after some initial difficulty
understand, usually after some initial difficulty	adopt
	take hold of or attach to