comprehend vs catch on

comprehend and catch on both are verbs.

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

As verbs, catch on is a hyponym of comprehend; that is, catch on is a word with a more specific, narrower meaning than comprehend:

Other hyponyms of comprehend include figure, cotton on, get it, get onto, get wise, latch on, tumble, twig, intuit, digest.

comprehend (verb)	catch on (verb)
get the meaning of something	become popular
to become aware of through the senses	understand, usually after some initial difficulty
include in scope; include as part of something broader; have as one's sphere or territory