mix vs mix up

mix is a noun but mix up is not a noun.

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

mix (noun)	mix up (noun)
the act of mixing together
an event that combines things in a mixture
a commercially prepared mixture of dry ingredients

mix (verb)	mix up (verb)
mix together different elements	cause to be perplexed or confounded
add as an additional element or part	assemble without order or sense
combine (electronic signals)
to bring or combine together or with something else
mix so as to make a random order or arrangement
open (a place) to members of all races and ethnic groups