'Mighty' in the Bible

I saw a mighty angel proclaiming with a loud voice, "Who is worthy to open the book, and to break its seals?"

I saw a mighty angel coming down out of the sky, clothed with a cloud. A rainbow was on his head. His face was like the sun, and his feet like pillars of fire.

There were lightnings, sounds, and thunders; and there was a great earthquake, such as was not since there were men on the earth, so great an earthquake, so mighty.

He cried with a mighty voice, saying, "Fallen, fallen is Babylon the great, and she has become a habitation of demons, a prison of every unclean spirit, and a prison of every unclean and hateful bird!

A mighty angel took up a stone like a great millstone and cast it into the sea, saying, "Thus with violence will Babylon, the great city, be thrown down, and will be found no more at all.

I heard something like the voice of a great multitude, and like the voice of many waters, and like the voice of mighty thunders, saying, "Hallelujah! For the Lord our God, the Almighty, reigns!

that you may eat the flesh of kings, the flesh of captains, the flesh of mighty men, and the flesh of horses and of those who sit on them, and the flesh of all men, both free and slave, and small and great."