bargee vs sea dog

bargee and sea dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
bargee	Yes	No	No	No
sea dog	Yes	No	No	No

As nouns, sea dog is a hypernym of bargee; that is, sea dog is a word with a broader meaning than bargee:

Other hypernyms of bargee include gob, Jack-tar, Jack, mariner, old salt, seafarer, seaman, tar.

bargee (noun)	sea dog (noun)
someone who operates a barge	a man who serves as a sailor