Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun aquanaut

2 senses of aquanaut

Sense 1
skin-diver, aquanaut -- (an underwater swimmer equipped with a face mask and foot fins and either a snorkel or an air cylinder)
       => swimmer, natator, bather -- (a person who travels through the water by swimming; "he is not a good swimmer")

Sense 2
aquanaut, oceanaut -- (a skilled worker who can live in underwater installations and participate in scientific research)
       => skilled worker, trained worker, skilled workman -- (a worker who has acquired special skills)