navy man vs sailor

navy man and sailor both are nouns.

Word	Noun	Adjective	Verb	Adverb
navy man	Yes	No	No	No
sailor	Yes	No	No	No

As nouns, navy man and sailor are synonyms defined as:

Other synonyms of navy man include bluejacket, sailor boy.

navy man (noun)	sailor (noun)
a serviceman in the navy	a stiff hat made of straw with a flat crown
	any member of a ship's crew
	a serviceman in the navy