The ancient Egyptian deity that was considered the Ferryman to the underworld is Aken.
The ancient Egyptian deity that was considered an Evil serpent of the Underworld is Apophis.
Osiris was the usual Ancient Egyptian god of the underworld.
Ancient Egyptian religion was a complex system of polytheistic beliefs and rituals which were an integral part of ancient Egyptian society. Osiris was one of these gods.
Ancient Greeks believed that it was needed to pay Charon, the ferryman who carried people accross the river Styx to the Underworld in his boat.
Anubis ancient Egyptian god of the underworld guided and protected the spirits of the dead
The River Styx is in the underworld. Dead souls are ferried across it by Charon the ferryman. The River Styx was a mythological river that flowed between the ends of the Earth and the beginnings of the Underworld.
There really wasn't a password. It was based on the amount of drachmas (gold coins from ancient Greece) they gave the ferryman.
One Egyptian word that starts with "o" is "Osiris," the ancient Egyptian god of the afterlife, the underworld, and rebirth. He is often depicted with green skin and a pharaoh's beard, and was considered a central figure in Egyptian mythology.
Ra is an ancient Egyptian sun god, often depicted with a falcon head and a sun disk on his head. He was considered the most important of all gods in ancient Egyptian religion and was believed to rule the sun, sky, and underworld. Ra was also associated with creation, life, and light.
The ancient Egyptian deity that was considered the god of the horizon is Aker.
The ancient Egyptian deity that was considered a war god is Anhur.
The ancient Egyptian deity that was considered the embodiment of the dawn is Khepry.