The belief in God is commonly referred to as "theism".
The belief in only one god is monotheism.
The word "imaan" means "belief in God," while "Islam" means "security through submission to God."
I think you mean monotheism. That simply means the belief in one God. Mono means "one" and theos is the greek word for God. Thus monotheism means "one God".
Ism: represents Belief In or Commitment To. Theism: "theos" means god or God; "a belief in or commitment to God" Pan-theism: "pan" means All, Everywhere; "a belief or commitment to a god being everywhere or in all things" A-theism: "a" means Not, Negative-of; "a belief that there is no God" Mono-theism: "mono" means One, Single, Undivided; "a belief that there is only one God"
Atheism.
when someone has belief of more than 1 god it is called polytheism. polytheism is a word that has the definition of this noun means the belief or worship of more than 1 god.
Sikh's belief in one God, they call God Waheguru means 'Wonderful Lord'.
The word for a belief or religion having one god is "monotheism".
Christian
A belief is a strongly held opinion: Opinions.Convictions
theistic means has qualities of a god or believing in god, theism means the belief in god
Monotheism is the belief in only one God.