mishmash vs mixture

mishmash and mixture both are nouns.

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

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

mishmash (noun)	mixture (noun)
a motley assortment of things	the act of mixing together
	an event that combines things in a mixture
	any foodstuff made by combining different ingredients
	a collection containing a variety of sorts of things
	(chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)