mixture vs premix

mixture and premix both are nouns.

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

As nouns, premix is a hyponym of mixture; that is, premix is a word with a more specific, narrower meaning than mixture:

Other hyponyms of mixture include mincemeat, dressing, stuffing, roux, batter, dough, mix, filling.

mixture (noun)	premix (noun)
the act of mixing together	a commercially prepared mixture of dry ingredients
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)