What Is The Belief In Many Gods Called?

Belief in many Gods is polytheism.  The belief that there are gods in everything is pantheism.

Worship of many gods is called polytheism.
Belief in many gods is called polytheism.
"The Belief of many gods" would be what many gods believe.  I can't imagine how anyone could answer that.

There are many "religions" that have believed and praised many gods. Pagan, Hinduism, polytheistic.... Just to name a few.

Belief in more than one God is called pantheism. It was widely practiced in ancient Rome and Greece

Polytheism. And the belief that god is in everything is pantheism ;)

Its not called anything, its a sin because one of the ten commandments are have no other gods before me. God said that.