That's not actually what I meant, but the challenge seems interesting. lemme see...

Reciprocity? (I'm looking for a word to describe what happens when Islam holds Jesus up as a prophet worth listening to, but Christians afford no such courtesy to Muhammad.)

Faith (Firefly's Book asks Mal, "when I ask you to have faith, why do you think I'm talking about God?")

Ethics vs Morals (few people I know seem to recognize a difference, let alone agree on it)

Moral Class (If we were to encounter a powerful extraterrestrial, how would we know they weren't God? How would they understand the question if we asked them?)

I guess the words weren't so small after all...