slice up vs slice

slice up is not a noun while slice is a noun.

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

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

slice up (noun)	slice (noun)
	a golf shot that curves to the right for a right-handed golfer
	a spatula for spreading paint or ink
	a serving that has been cut from a larger portion
	a thin flat piece cut off of some object
	a share of something
	a wound made by cutting

slice up (verb)	slice (verb)
cut into slices	hit a ball so that it causes a backspin
	cut into slices
	make a clean cut through
	hit a ball and put a spin on it so that it travels in a different direction