sailor boy vs sailor

sailor boy and sailor both are nouns.

Word	Noun	Adjective	Verb	Adverb
sailor boy	Yes	No	No	No
sailor	Yes	No	No	No

As nouns, sailor boy and sailor are synonyms defined as:

Other synonyms of sailor boy include bluejacket, navy man.

sailor boy (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