acerbity vs tartness

acerbity and tartness both are nouns.

Word	Noun	Adjective	Verb	Adverb
acerbity	Yes	No	No	No
tartness	Yes	No	No	No

As nouns, acerbity and tartness are synonyms defined as:

Other synonyms of acerbity include acrimony, bitterness, jaundice, thorniness.

As nouns, acerbity and tartness are synonyms defined as:

acerbity (noun)	tartness (noun)
a rough and bitter manner	a sharp sour taste
a sharp sour taste	a rough and bitter manner
a sharp bitterness	the taste experience when vinegar or lemon juice is taken into the mouth