seize on vs sweep up

seize on and sweep up both are verbs.

Word	Noun	Adjective	Verb	Adverb
seize on	No	No	Yes	No
sweep up	No	No	Yes	No

As verbs, sweep up is a hypernym of seize on; that is, sweep up is a word with a broader meaning than seize on:

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

Other hypernyms of seize on include adopt, embrace, espouse.

seize on (verb)	sweep up (verb)
adopt	take up the cause, ideology, practice, method, of someone and use it as one's own
	force into some kind of situation, condition, or course of action