Gehenna
GEHEN'NA,noun [Heb. ge-hinom, the valley of Hinom, in which was Tophet, where the Israelites sacrificed their children to Moloch. 2 Kings 23:10.]
This word has been used by the Jews as equivalent to hell, place of fire or torment and punishment, and the Greek word is rendered by our translators by hell and hell-fire. Matthew 18:9. 23.15.