bo'sun vs tar

bo'sun and tar both are nouns.

Word	Noun	Adjective	Verb	Adverb
bo'sun	Yes	No	No	No
tar	Yes	No	Yes	No

As nouns, tar is a hypernym of bo'sun; that is, tar is a word with a broader meaning than bo'sun:

bo'sun: a petty officer on a merchant ship who controls the work of other seamen
tar: a man who serves as a sailor

Other hypernyms of bo'sun include gob, Jack-tar, Jack, mariner, old salt, sea dog, seafarer, seaman.

bo'sun (noun)	tar (noun)
a petty officer on a merchant ship who controls the work of other seamen	a man who serves as a sailor
	any of various dark heavy viscid substances obtained as a residue

bo'sun (verb)	tar (verb)
	coat with tar