Dropline, or fishing line that is used for deep-sea fishing, is known by various terms. One synonym for dropline is bottom fishing rig. It refers to the fishing technique that involves dropping a baited hook to the sea floor. A dropper rig is also another term for dropline, which is a fishing rig that allows multiple hooks to be attached to a single main line. Some anglers also refer to dropline as downrigger, which is a device that is used to keep the fishing line at a certain depth in the water. Other possible synonyms for dropline include sinker line, benthic rig, sea-bottom rig, and bottom feeder rig.