-mancy, -mancer, -mantic, -mantical

(Greek: used as a suffix; divination, prophecy, fortune telling; to interpret signs so “practical” decisions can be made [related to -mania])

It isn't so much the things we don't know that gets us into trouble. It's the things we know that aren't so.

—Artemus Ward (1834-1867)

If you keep on saying things are going to be bad, you have a good chance of being a prophet.

—Isaac Bashevis Singer (1904-1991),
Polish-born American journalist, writer.
zoomancy
Divination with observations of animals or their movements under particular circumstances; imaginary animals that people claim to have seen; such as, a salamander playing around in a fire or a sea serpent riding ocean waves.
zygomancy
Divination with weights.

Cross references of word families that are related directly, or indirectly, to: "divination, diviner; seer, soothsayer, prophecy, prophesy, prophet": augur-; auspic-; fa-, fate; Fates in action; futur-; omen; -phemia; sorc-, sorcery; vati-.

A cross reference of other word family units that are related directly, or indirectly, to: "chance, luck, fate": aleato-; auspic-; cad-; fortu-; serendipity; sorc; temer-; tycho-.