It takes more faith to be an atheist than to believe in a supernatural power or being.
The consensus of science, based on cosmology and astrophysics, is that the universe is not itself eternal, did indeed have a beginning, and that all matter and energy at one time existed at one point. Then, there was a big bang that propelled it all into motion. And according to astronomers, it's all still moving today.
Newton's law of motion states that bodies at rest stay at rest unless acted upon by an outside force. If the entirety of the universe's matter and energy existed at one point, any outside force would be outside of all matter and energy in the universe. Something outside all matter and energy in the universe is by definition supernatural. Therefore, according to science, a supernatural force was necessary to act upon that single body of matter and energy causing the big bang.
Now, if we want to look at it logically as well, there is a maxim of logic that dictates "ex nihilo nihil fit" which means out of nothing, nothing comes. IOW, things don't simply pop into existence from nothing, rather they are brought into existence by something. Therefore, if the universe did indeed have a beginning as science demands, then there is a logical necessity for a supernatural force or being (a something) to bring it into existence.
So, unless one has enough faith to throw science and logic out the window, he will come to the inescapable conclusion that a supernatural force or being exists.
Therefore, being a faith-based view, atheism certainly fits the description of a religion.