What is another word for "trident"?

Roget's Thesaurus (1911) lists these synonyms for "trident": afloat, brine, cotidal, cube, deep, dolphin, great, high, hydrographer, hydrographic, hydrography, leash, main, marine, maritime, motion, nymph, ocean, oceanic, offing, pelagian, pelagic, power, root, salt, sea, seagoing, shamrock, ternary, ternion, tertiary, third, three, tide, tierce, trefoil, trey, triad, triangle, triform.