Synonyms and related words :
Aqua-Lung, U-boat, U-boot, Unterseeboot, air cylinder, aquascope, bathyscaphe, bathysphere, benthoscope, buried, diving bell, diving boat, diving chamber, diving goggles, diving helmet, diving hood, diving mask, diving suit, drowned, engulfed, flooded, immersed, inundated, periscope, pigboat, scuba, snorkel, sub, subaqueous, submerged, submersed, submersible, sunken, swim fins, undersea, underwater, wet suit