sweep off vs impress

sweep off is not a noun while impress is a noun.

Word	Noun	Adjective	Verb	Adverb
sweep off	No	No	Yes	No
impress	Yes	No	Yes	No

As verbs, impress is a hypernym of sweep off; that is, impress is a word with a broader meaning than sweep off:

Other hypernyms of sweep off include affect, move, strike.

sweep off (noun)	impress (noun)
	the act of coercing someone into government service

sweep off (verb)	impress (verb)
overwhelm emotionally	dye (fabric) before it is spun
	produce or try to produce a vivid impression of
	mark or stamp with or as if with pressure
	take (someone) against his will for compulsory service, especially on board a ship
	reproduce by printing
	impress positively
	have an emotional or cognitive impact upon