slice vs slice up

slice is a noun but slice up is not a noun.

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

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

slice (noun)	slice up (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 (verb)	slice up (verb)
hit a ball so that it causes a backspin	cut into slices
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