aquanaut vs oceanaut

aquanaut and oceanaut both are nouns.

Word	Noun	Adjective	Verb	Adverb
aquanaut	Yes	No	No	No
oceanaut	Yes	No	No	No

As nouns, aquanaut and oceanaut are synonyms defined as:

aquanaut and oceanaut: a skilled worker who can live in underwater installations and participate in scientific research

aquanaut (noun)	oceanaut (noun)
an underwater swimmer equipped with a face mask and foot fins and either a snorkel or an air cylinder	a skilled worker who can live in underwater installations and participate in scientific research
a skilled worker who can live in underwater installations and participate in scientific research