relativist — an adherent or advocate of relativism or of the principle of relativity.
trimmer — the condition, order, or fitness of a person or thing for action, work, use, etc.
agnostic — An agnostic believes that it is not possible to know whether God exists or not. Compare atheist.
waverer — to sway to and fro; flutter: Foliage wavers in the breeze.
vacillator — to waver in mind or opinion; be indecisive or irresolute: His tendency to vacillate makes him a poor leader.
cheat — When someone cheats, they do not obey a set of rules which they should be obeying, for example in a game or exam.
con artist — A con artist is someone who tricks other people into giving them their money or property.
perjurer — to render (oneself) guilty of swearing falsely or of willfully making a false statement under oath or solemn affirmation: The witness perjured herself when she denied knowing the defendant.
phony — not real or genuine; fake; counterfeit: a phony diamond.
storyteller — a person who tells or writes stories or anecdotes.
deceiver — to mislead by a false appearance or statement; delude: They deceived the enemy by disguising the destroyer as a freighter.
deluder — to mislead the mind or judgment of; deceive: His conceit deluded him into believing he was important.
fable — a short tale to teach a moral lesson, often with animals or inanimate objects as characters; apologue: the fable of the tortoise and the hare; Aesop's fables.