As an adjective atheistic
is of or relating to atheists or atheism.
As a noun atheisticness is
the state or quality of being atheistic.
atheistic
English
Adjective
(
en adjective)
of or relating to atheists or atheism
Synonyms
* atheistical
* (obsolete) atheous
* nontheistic
Antonyms
* theistic
atheisticness
English
Noun
(-)
The state or quality of being atheistic.