Top of my head…
Atheism and those which have lead to it:
Rationalism (use of reason alone)
Materialism (anything supernatural doesn’t exist)
Idealism (our ideas are separate from the world and our bodies)
Scientism (only the scientific method can prove that which is true)
Views of God:
Deism (there’s a supreme being that created the Universe but has left it “by itself”)
Pantheism (God is the Universe)
Faith:
Fideism (faith alone without reason)