As nouns the difference between untruth and inveracity
is that untruth is a lie or falsehood while inveracity is (uncountable) a lack of veracity.
untruth
English
Noun
(
en noun)
A lie or falsehood.
The condition of being false; truthlessness.
Synonyms
* see
inveracity
English
Noun
(uncountable) A lack of veracity
(countable) untruth, falsehood