Actually, being an atheist means you dont beleive in or worship a god.. Kind of like Buddhists, bud Buddhism is a religion in and of itself.

Historically several civilizations around the world practiced atheism as their state religion, despite not being followers of a specific god or deity... This practice dates back hundreds of years in Europe, Asian and Russia.

So yes, atheism is a religion in and of itself (because it has a beleif system attached to it.. the belief that God doesnt exist), it just doesnt have a specific 'immortal' being (read as God) attached to it.

Nonetheist or agnostic is the term i think you were looking for

Regards,

Lee