There are three words translated into the English word 'hell' in scripture.
In the Old Testament, the Hebrew word is sheol - which means 'grave' or hole in the ground.
In the Greek, the words are hades, which has the same meaning as sheol (unless you are referencing the Greek god of the underworld), Tartarus - which is used only once in 2 Peter 2:4-6 and is in reference to Satan and demons being in a place of outer darkness reserved for judgement, and Gehenna - which was a literal place in Jerusalem where garbage was thrown and burned day and night.
From a theological view, nearly all Bible-Believing Christians acknowledge a lake of fire or 'Gehenna' as Jesus ascribes it - where Satan and Death and the Wicked who are not Written in the Book of Life are cast into (Revelation 20).
The debate is usually over whether being cast into that Gehenna is a permanent existence in burning misery for all eternity, or the cessation of life and consciousness for all eternity: aka the Second Death.