As nouns the difference between mendacity and inveracity
is that mendacity is the fact or condition of being untruthful; dishonesty while inveracity is (uncountable) a lack of veracity.
mendacity
English
Noun
(mendacities)
The fact or condition of being untruthful; dishonesty.
*
A lie, deceit or falsehood.
Related terms
* mendacious
* mendaciously
* mendaciousness
inveracity
English
Noun
(uncountable) A lack of veracity
(countable) untruth, falsehood