mixture vs selection

mixture and selection both are nouns.

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

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

mixture (noun)	selection (noun)
the act of mixing together	the act of choosing or selecting
an event that combines things in a mixture	the person or thing chosen or selected
any foodstuff made by combining different ingredients	a passage selected from a larger work
a collection containing a variety of sorts of things	an assortment of things from which a choice can be made
(chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)	a natural process resulting in the evolution of organisms best adapted to the environment