As nouns the difference between aridness and acridness
is that aridness is the state or quality of being arid while acridness is bitterness or acerbity.
aridness
English
Noun
(-)
The state or quality of being arid.
Anagrams
*
acridness
English
Noun
(-)
bitterness or acerbity
An acrid taste or smell.
Synonyms
* acridity