What is the ancient Greek equivalent to hell?

Some believe the 3 Greek Words translated to English as 'hell' are actually an interpolation - that is something added to or altering/corrupting with something foreign which in this case is an 'idea' of men. Be that as it may, there are 3 Words translated as hell from the Greek. They are:

Hades - meaning unseen or grave or pit and is equivalent to 'sheol' in Hebrew.

Gehenna - valley of Hinnom and a burning city garbage dump.

Tartaroo/tartarus - a dark place of restraint for the fallen angels used one time in The Bible.

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