sailor vs gob

sailor and gob both are nouns.

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

As nouns, gob is a hyponym of sailor; that is, gob is a word with a more specific, narrower meaning than sailor:

sailor (noun)	gob (noun)
a stiff hat made of straw with a flat crown	informal terms for the mouth
any member of a ship's crew	a lump of slimy stuff
a serviceman in the navy	a man who serves as a sailor