adopt vs fasten on

adopt and fasten on both are verbs.

Word	Noun	Adjective	Verb	Adverb
adopt	No	No	Yes	No
fasten on	No	No	Yes	No

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

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

Other hyponyms of adopt include hook on, latch on, seize on, take up.

adopt (verb)	fasten on (verb)
take into one's family	adopt
take on a certain form, attribute, or aspect
take up the cause, ideology, practice, method, of someone and use it as one's own
put into dramatic form
take up and practice as one's own
choose and follow; as of theories, ideas, policies, strategies or plans
take on titles, offices, duties, responsibilities