espouse vs latch on

espouse and latch on both are verbs.

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

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

espouse: take up the cause, ideology, practice, method, of someone and use it as one's own
latch on: adopt

Other hyponyms of espouse include fasten on, hook on, seize on, take up.

espouse (verb)	latch on (verb)
take up the cause, ideology, practice, method, of someone and use it as one's own	understand, usually after some initial difficulty
choose and follow; as of theories, ideas, policies, strategies or plans	adopt
take in marriage; married	take hold of or attach to