Creed (cert/cred) Noun A statement of the basic beliefs of a religion; an idea or set of beliefs that guides the action of a person or group My group and I live by the creed "do to others as you would have to them".
Credence (cert/cred) Noun Belief that something is true; the quality of being believed or accepted as something true or real I have a lot of credence that animals can talk to each other.
Credulous (cert/cred) Noun Too ready to believe things; easily fooled or cheated I have to find my credulous friend Jonny before he is told to steal answers.