There are some other terms related to hell, but are not translated as hell – lake of fire, bottomless pit, abyss, and outer darkness.
Lake of fire is mentioned 5 times in the book of Revelation.
The beast and the false prophet are cast into it.
[Rev 19:20 KJV] 20 And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone.The devil is cast into it and tormented forever.
[Rev 20:10 KJV] 10 And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet [are], and shall be tormented day and night for ever and ever.Death and hell (Hades) are cast into it.
[Rev 20:14 KJV] 14 And death and hell were cast into the lake of fire. This is the second death.Those not found in the book of life are cast into it.
[Rev 20:15 KJV] 15 And whosoever was not found written in the book of life was cast into the lake of fire.Certain sinners are cast into it.
[Rev 21:8 KJV] 8 But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.JehovahsWitness’ post on the lake of fire:
viewtopic.php?p=337866#337866
https://debatingchristianity.com/forum/viewtopic.php?p=970389#p970389