mixture vs roux

mixture and roux both are nouns.

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

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

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

mixture (noun)	roux (noun)
the act of mixing together	a mixture of fat and flour heated and used as a basis for sauces
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)