Definitions of words in Revelation 9:1:
Abyss {International Standard Bible Encyclopedia}
Angel {Easton's Bible Dictionary}
Angel {International Standard Bible Encyclopedia}
Earth {Easton's Bible Dictionary}
Earth {International Standard Bible Encyclopedia}
Key {Easton's Bible Dictionary}
Key {International Standard Bible Encyclopedia}
Saw {International Standard Bible Encyclopedia}
Shaft {International Standard Bible Encyclopedia}
Sky {International Standard Bible Encyclopedia}