brewer's yeast vs Saccharomyces cerevisiae

brewer's yeast and Saccharomyces cerevisiae both are nouns.

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

As nouns, brewer's yeast and Saccharomyces cerevisiae are synonyms defined as:

brewer's yeast and Saccharomyces cerevisiae: used as a leaven in baking and brewing

Other synonyms of brewer's yeast include baker's yeast.

brewer's yeast (noun)	Saccharomyces cerevisiae (noun)
used as a leaven in baking and brewing	used as a leaven in baking and brewing
yeast used in fermenting beer