mixed bag vs miscellanea

mixed bag and miscellanea both are nouns.

Word	Noun	Adjective	Verb	Adverb
mixed bag	Yes	No	No	No
miscellanea	Yes	No	No	No

As nouns, mixed bag and miscellanea are synonyms defined as:

mixed bag and miscellanea: a collection containing a variety of sorts of things

Other synonyms of mixed bag include assortment, miscellany, mixture, motley, potpourri, salmagundi, smorgasbord, variety.

mixed bag (noun)	miscellanea (noun)
a collection containing a variety of sorts of things	a collection containing a variety of sorts of things