cream of tartar vs potassium bitartrate

cream of tartar and potassium bitartrate both are nouns.

Word	Noun	Adjective	Verb	Adverb
cream of tartar	Yes	No	No	No
potassium bitartrate	Yes	No	No	No

As nouns, cream of tartar and potassium bitartrate are synonyms defined as:

cream of tartar and potassium bitartrate: a salt used especially in baking powder

Other synonyms of cream of tartar include potassium hydrogen tartrate, tartar.

cream of tartar (noun)	potassium bitartrate (noun)
a salt used especially in baking powder	a salt used especially in baking powder