Oinomancy
It’s a divination form using wine as medium. The method included by the study of the surface of dark wine in a goblet.
Oculomancy
It’s a divination form by the study of people’s eyes.
Ololygomancy
It’s a divination form by the interpretation of the howling of dogs.
Oneiromancy
It’s a divination form by the interpretation of dreams and their prophetic nature.
Onomancy
It’s a divination form on the basis of names, perhaps related to
Numerology.
Onychomancy
It’s a divination form by gazing into highly polished fingernails.
Ornithomancy
It’s a divination form by study the flight and behavior of birds.