tartar vs calculus

tartar and calculus both are nouns.

Word	Noun	Adjective	Verb	Adverb
tartar	Yes	No	No	No
calculus	Yes	No	No	No

As nouns, tartar and calculus are synonyms defined as:

Other synonyms of tartar include tophus.

tartar (noun)	calculus (noun)
an incrustation that forms on the teeth and gums	the branch of mathematics that is concerned with limits and with the differentiation and integration of functions
a fiercely vigilant and unpleasant woman	a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body
a salt used especially in baking powder	an incrustation that forms on the teeth and gums