As nouns the difference between tartness and acridness
is that tartness is the characteristic of being tart; sharpness of taste; sourness; bitterness while acridness is bitterness or acerbity.
tartness
English
Noun
(es)
The characteristic of being tart; sharpness of taste; sourness; bitterness.
acridness
English
Noun
(-)
bitterness or acerbity
An acrid taste or smell.
Synonyms
* acridity