espouse vs hook on

espouse and hook on both are verbs.

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

As verbs, hook on is a hyponym of espouse; that is, hook 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
hook on: adopt

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

espouse (verb)	hook on (verb)
take up the cause, ideology, practice, method, of someone and use it as one's own	adopt
choose and follow; as of theories, ideas, policies, strategies or plans
take in marriage; married