Try pantheism. If one fundamentaly believes that god does not exist, which clearly involves faith, then yes it is a religion.

Then I guess you could say that pantheism is an atheist religion, as opposed to a theist religion. My nice definition of atheism is reason over faith, science over mysticism, basically an anti-religion. While that may be etymologically unjustified, it does accurately reflect the views of the majority of people I know who call themselves atheist, myself included. Notice my brackets: a- (without) + [theos (god) + ismos (practice or doctrine)] not [a- (without) + theos (god)] + ismos (practice or doctrine)

By your view an agnostic can't be religion

No, and it's not, it's like standing in the doorway of a religion, not sure whether to enter or leave, perhaps practicing but not believing. Such indecisiveness annoys me, but it accounts for the majority of the population. Matt