sweep off vs sweep away

sweep off and sweep away both are verbs.

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

As verbs, sweep off and sweep away are synonyms defined as:

sweep off (verb)	sweep away (verb)
overwhelm emotionally	eliminate completely and without a trace
	overwhelm emotionally