Dogmatic
Part of speech: adjective
Definition: Stubbornly adhering to insufficiently proven beliefs; inflexible, rigid.
Example sentence: Admittedly, I possess virtually no expertise in science. That puts me in exactly the same position as most dogmatic environmentalists who want to craft public policy around global warming fears.
Creed
Part of speech: verb
Definition: To believe; to credit.
Part of speech: noun
Definition: That which is believed; accepted doctrine, especially religious; a particular set of beliefs; any summary of principles or opinions professed or adhered to.A reading or statement of belief that summarizes the faith it represents; a definite summary of what is believed; a confession of faith for public use; esp., one which is brief and comprehensive.
Example sentence: I am always easy of belief when the creed pleases me.