mishmash vs assortment

mishmash and assortment both are nouns.

Word	Noun	Adjective	Verb	Adverb
mishmash	Yes	No	No	No
assortment	Yes	No	No	No

As nouns, assortment is a hypernym of mishmash; that is, assortment is a word with a broader meaning than mishmash:

Other hypernyms of mishmash include miscellanea, miscellany, mixed bag, mixture, motley, potpourri, salmagundi, smorgasbord, variety.

mishmash (noun)	assortment (noun)
a motley assortment of things	the act of distributing things into classes or categories of the same type
	a collection containing a variety of sorts of things