sweep away vs affect

sweep away is not a noun while affect is a noun.

Word	Noun	Adjective	Verb	Adverb
sweep away	No	No	Yes	No
affect	Yes	No	Yes	No

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

Other hypernyms of sweep away include impress, move, strike.

sweep away (noun)	affect (noun)
	the conscious subjective aspect of feeling or emotion

sweep away (verb)	affect (verb)
eliminate completely and without a trace	act physically on; have an effect upon
overwhelm emotionally	have an effect upon
	make believe with the intent to deceive
	have an emotional or cognitive impact upon
	connect closely and often incriminatingly