Catapult :: Catapult (n.) An engine somewhat resembling a massive crossbow, used by the ancient Greeks and Romans for throwing stones, arrows, spears, etc..
Catapult :: Catapult (n.) A forked stick with elastic band for throwing small stones, etc..
Hydropult :: Hydropult (n.) A machine for throwing water by hand power, as a garden engine, a fire extinguisher, etc..