irreligion
absence, indifference to, or rejection of religion
antireligion
opposition to religion; used to describe opposition to organized religion, or to describe a broader opposition to any form of belief in the supernatural or the divine; distinct from atheism
Irreligion in the Middle East
overview of irreligion in the Middle East
irreligion in Finland
overview of irreligion in Finland
atheism
absence of belief in the existence of deities; the opposite of theism