swoop up vs swoop

swoop up is not a noun while swoop is a noun.

Word	Noun	Adjective	Verb	Adverb
swoop up	No	No	Yes	No
swoop	Yes	No	Yes	No

As verbs, swoop up and swoop are synonyms defined as:

swoop up (noun)	swoop (noun)
	a swift descent through the air
	a very rapid raid
	(music) rapid sliding up or down the musical scale

swoop up (verb)	swoop (verb)
seize or catch with a swooping motion	seize or catch with a swooping motion
	move down on as if in an attack
	move with a sweep, or in a swooping arc