latch on vs get onto

latch on and get onto both are verbs.

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

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

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

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

latch on (verb)	get onto (verb)
understand, usually after some initial difficulty	understand, usually after some initial difficulty
adopt
take hold of or attach to