As nouns the difference between acridity and aridity
is that acridity is bitterness or acerbity while aridity is a long term lack of rainfall or moisture.
acridity
English
Noun
(acridities)
bitterness or acerbity
An acrid taste or smell.
Synonyms
* acridness
aridity
English
Noun
(aridities)
A long term lack of rainfall or moisture.