affect vs sweep away

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

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

As verbs, sweep away is a hyponym of affect; that is, sweep away is a word with a more specific, narrower meaning than affect:

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

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