"Because John does not believe in gods, he considers himself an atheist."
Your question is an example, albeit flawed, of a sentence containing the word "atheist."
the atheist later became a scientist :)
I am quite relieved to learn that you are not an atheist.
"Theodore Roosevelt once refered to Thomas Paine as an atheist, mistaking Paine's deism for a disbelief in God."
David is an atheist because he knows that the existence of god cannot be proven.
"John is an atheist, which means he does not believe in the existence of any gods or deities."
I am an atheist.An atheist is someone who doesn't believe in religion.It is everyone's right to choose their own religion and not be abused for it, including those who are atheist.
The priest renounced his faith and became an atheist.
This is not a question and it is barely a sentence.
Many philosophers have defended atheism; the rejection of the belief in gods.Atheism is the disbelief in gods.
You can use the word Truss in a sentence like this.
Can you use the word concluding in a sentence? Done.