jumble vs mix up

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

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

As verbs, jumble and mix up are synonyms defined as:

Other synonyms of jumble include confuse.

jumble (noun)	mix up (noun)
a theory or argument made up of miscellaneous or incongruous ideas
small flat ring-shaped cake or cookie
a confused multitude of things

jumble (verb)	mix up (verb)
bring into random order	cause to be perplexed or confounded
assemble without order or sense	assemble without order or sense
be all mixed up or jumbled together