Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
| aquabatic | relating to AQUABATICS. |
| aquabatics | spectacular feats in water. |
| aquacade | an exhibition of swimming, diving etc. |
| aquafit | a type of aerobic exercise performed in water. |
| aqualung | a lightweight, self-contained diving apparatus with compressed-air supply carried on the back. |
| aquanaut | a skin-diver; someone who explores and/or lives in the sea at considerable depth. |
| aquanautics | skin-diving. |
| aquarobic | relating to a system of exercises, similar to aerobics, performed to music in chest-high water > AQUAROBICS. |
| aquashow | an exhibition of swimming and diving. |
| aquatics | water sports. |
| aswim | swimming. |
| backstroke | a swimming stroke executed on the back and usually consisting of alternating circular arm pulls and a flutter kick; (verb) to swim backstroke > BACKSTROKING, BACKSTROKED. |
| backswimmer | one who swims on the back. |
| bellyflop | to perform a dive into water in which the body lands horizontally. |
| beltman | the member of a lifesaving team who swims out to the rescue, with a line tied to his belt. |
| bikini | a brief swimming-costume, in two separate parts > BIKINIS, BIKINIED. |
| bogie | (Aust.) to bathe or swim > BOGIES, BOGIEING, BOGIED. |
| breaststroke | a swimming-stroke performed breast-down, with circling movements of the arms and a frog-like movement of the legs. |
| butterfly | a very energetic swimming stroke ideal for terrorising old ladies. |
| butterflyer | a swimmer who does the butterfly stroke. |
| crawl | a swimming stroke in which the arms are held in front of the body and rotated from the shoulder alternately and the feet kicked up and down. |
| dive | to enter water more or less head-first. |
| diver | one that dives. |
| flipper | a broad flat limb used for swimming, as those of seals, sea turtles, whales, etc; a rubber foot-covering imitating this. |
| floater | one who floats or swims. |
| freediver | one who practises FREEDIVING. |
| freediving | the sport of diving for depth without apparatus > FREEDIVINGS. |
| freestyle | an event where the swimmer can choose the swimming stroke; since crawl is the fastest stroke freestyle is more or less synonymous with crawl. |
| freestyler | a swimmer who swims freestyle. |
| freestyling | the act of swimming FREESTYLE. |
| frogman | a person equipped for extended periods of underwater swimming. |
| header | a dive head foremost. |
| jackknife | a type of dive in which the body is hinged; (verb) to perform a jackknife. |
| kickboard | a buoyant rectangular board held by swimmers to practise kicking technique. |
| lido | a bathing beach; an open-air swimming pool > LIDOS. [The original Lido is a beach resort near Venice, Italy. The town's name comes from the Italian word lido, shore or bank.] |
| lifeline | a line thrown to swimmers in difficulties. |
| lifesaving | the skill or practice of saving or protecting the lives especially of drowning persons. |
| lifeguard | one employed to assist swimmers in difficulties; (verb) to act as a lifeguard. |
| lifesaver | a lifeguard. |
| monokini | a woman's topless beach garment consisting of the lower half of a bikini. |
| natation | swimming. |
| natational | relating to NATATION. |
| natatorial natatory | of or relating to swimming; adapted to or characterized by swimming e.g. natatorial birds. Human beings are basically not natatorial creatures. |
| natatorium | an indoor swimming-pool > NATATORIUMS or NATATORIA. |
| nonswimmer | someone who does not swim. |
| outsweep | to make an outward movement of the arms in swimming breast-stroke. |
| outswim | to swim faster or farther than |
| overswim | to swim across. |
| paddleboard | a long narrow buoyant board used for rescuing swimmers. |
| piscine | a pool, a pond, esp. one for bathing or swimming. |
| poolside | the area at the side of a swimming pool. |
| postdive | after a dive. |
| predive | before diving e.g. 'his predive routine'. |
| schnorkel | to swim underwater using a breathing-tube > SCHNORKELS, SCHNORKELING or SCHNORKELLING, SCHNORKELED or SCHNORKELLED; SNORKELS, SNORKELED or SNORKELLED, SNORKELING or SNORKELLING. |
| scuba | an underwater breathing device; (verb) to dive using a scub > SCUBAS, SCUBAING, SCUBAED. |
| sidestroke | a swimming stroke which is executed on the side and in which the arms are swept in separate strokes towards the feet and downward and the legs do a scissors kick. |
| snorkel | see SCHNORKEL. |
| snorkeler snorkeller | one who snorkels. N.B. no SCHNORKELER*. |
| soom | (Scots) to swim. |
| subaqua | under water. |
| subaquatic | taking place under water. |
| surfboat | a boat capable of riding the surf, used in lifesaving. |
| surfman | one who operates a surfboat. |
| swim | to propel oneself in water by natural means > SWIMS, SWIMMING, SWAM, SWUM. |
| swimmable | capable of being swum. |
| swimmer | one that swims. |
| swimmingly | in swimming fashion. |
| swimsuit | a costume worn for swimming. |
| swimwear | anything worn for swimming > SWIMWEARS. |
| synchro | synchronized swimming > SYNCHROS. |
| tankini | a women's two-piece swimming costume. |
| trudgen trudgeon | a swimming stroke in which each hand alternately is raised above the surface, thrust forward, and pulled back through the water. |
| urinator | a diver. |
| wetsuit | a suit worn to keep warm in cold water |
| wettie | (NZ) a wetsuit. |