In a sense, yes, in that He is unbound by any limits imposed by language. However, I think most religions hold that their God is omnipotent, omniscient, omnipresent, infinite and eternal. By definition there can be only one such Being. To argue that the Gods of different religions are different, you must put some limitations on your or the other guy's God. Since the other guy's religion is not teaching that his God is less than eternal, infinite, etc., the only way to win this argument is to define your God as something smaller. That seems like a form of blasphemy to me.
It's fine to say many followers of a religion are corrupt and immoral and that what is commonly taught is evil. I don't think, though, that Christians or Muslims can say my God is better than your God. It doesn't make sense.