We shouldn't forget that Almighty God DID use many words to describe Himself in Holy Scripture - though it would be foolish to imagine it was exhaustive. We wouldn't know anything at all about Him had He not. Jesus also gave us insight into the nature of the Father and the eternal Godhead as well as His plans for His creation. So, whatever words we use to describe God can be those words He used and the thoughts those words and names provide us helps enormously to give us a firm enough understanding of Him so that we desire to follow and obey Him once He has opened our eyes and hearts to His reality.
Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am. - John 8:58
As soon then as he had said unto them, I am [he], they went backward, and fell to the ground. John 18:6
I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty. - Revelation 1:8