From Christopher Fisher:
In contrast to “omnipotent”, God is called “Almighty” 57 times in the Bible. Often, it is a nominal adjective that is used in place of God’s own name. The Bible seriously identifies “Almighty” with God; this is what God wants to be called. God illustrates His Almighty-ness with examples of Him being Almighty.
Gen 15:7 Then He said to him, “I am the LORD, who brought you out of Ur of the Chaldeans, to give you this land to inherit it.”
Gen 26:24 And the LORD appeared to him the same night and said, “I am the God of your father Abraham; do not fear, for I am with you. I will bless you and multiply your descendants for My servant Abraham’s sake.”
Exo 6:7 I will take you as My people, and I will be your God. Then you shall know that I am the LORD your God who brings you out from under the burdens of the Egyptians.
God connects Himself with His creative action. God is Almighty because He does powerful things. God is the “living” God, often contrasted to stone idols that have no power. God is active and working in creation. This is the context of God calling Himself “Almighty”, not philosophical proofs invented by human beings.
For context, click here.