Atheist(n.) One who disbelieves or denies the existence of a God, or supreme intelligent Being.
Atheist(n.) A godless person.
Atheistic(a.) Alt. of Atheistical
Atheistical(a.) Pertaining to, implying, or containing, atheism; -- applied to things; as, atheistic doctrines, opinions, or books.
Atheistical(a.) Disbelieving the existence of a God; impious; godless; -- applied to persons; as, an atheistic writer.

Words within atheistic