Does the Bible ever mention atheism and where? Not necessarily the actual word as such. Mostly people are described as chasing after other gods. What about no gods?
There is a lot of talk about Godless men, which would be someone that likely doesn't believe in God or fear God (or any gods) -- usually one or the other.

Psalms 14:1 - The fool has said in his heart, &quot;There is no God.&quot;
Psalms 10:4 - The wicked, in the haughtiness of his countenance, does not seek Him. All his thoughts are, &quot;There is no God.&quot;
Psalm 36:1 - Transgression speaks to the ungodly within his heart; There is no fear of God before his eyes.

More from this link I found.
Also check this answer.