brewer's yeast vs yeast

brewer's yeast and yeast both are nouns.

Word	Noun	Adjective	Verb	Adverb
brewer's yeast	Yes	No	No	No
yeast	Yes	No	No	No

As nouns, yeast is a hypernym of brewer's yeast; that is, yeast is a word with a broader meaning than brewer's yeast:

brewer's yeast: used as a leaven in baking and brewing
yeast: any of various single-celled fungi that reproduce asexually by budding or division

As nouns, yeast is a hypernym of brewer's yeast; that is, yeast is a word with a broader meaning than brewer's yeast:

brewer's yeast: yeast used in fermenting beer
yeast: a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey

Other hypernyms of brewer's yeast include barm.

brewer's yeast (noun)	yeast (noun)
used as a leaven in baking and brewing	any of various single-celled fungi that reproduce asexually by budding or division
yeast used in fermenting beer	a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey