tartness vs bitterness

tartness and bitterness both are nouns.

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

As nouns, tartness and bitterness are synonyms defined as:

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

tartness (noun)	bitterness (noun)
a sharp sour taste	the property of having a harsh unpleasant taste
a rough and bitter manner	a rough and bitter manner
the taste experience when vinegar or lemon juice is taken into the mouth	the taste experience when quinine or coffee is taken into the mouth
	a feeling of deep and bitter anger and ill-will