'Hell' in the Bible

And I was dead, and see, I am living for ever, and I have the keys of death and of Hell.

And I saw a grey horse, and the name of him who was seated on it was Death; and Hell came after him. And there was given to them authority over the fourth part of the earth, to put to destruction by the sword, and by taking away their food, and by death, and by the beasts of the earth.

And the sea gave up the dead which were in it; and death and Hell gave up the dead which were in them; and they were judged every man by his works.

And death and Hell were put into the sea of fire. This is the second death, even the sea of fire.