mixing vs admixture

mixing and admixture both are nouns.

Word	Noun	Adjective	Verb	Adverb
mixing	Yes	No	No	No
admixture	Yes	No	No	No

As nouns, mixing and admixture are synonyms defined as:

Other synonyms of mixing include commixture, intermixture, mix, mixture.

mixing (noun)	admixture (noun)
the act of mixing together	the act of mixing together
	an additional ingredient that is added by mixing with the base
	the state of impairing the quality or reducing the value of something