get onto vs catch on

get onto and catch on both are verbs.

Word	Noun	Adjective	Verb	Adverb
get onto	No	No	Yes	No
catch on	No	No	Yes	No

As verbs, get onto and catch on are synonyms defined as:

get onto and catch on: understand, usually after some initial difficulty

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

get onto (verb)	catch on (verb)
understand, usually after some initial difficulty	become popular
	understand, usually after some initial difficulty