proprietress vs proprietor

proprietress and proprietor both are nouns.

Word	Noun	Adjective	Verb	Adverb
proprietress	Yes	No	No	No
proprietor	Yes	No	No	No

As nouns, proprietor is a hypernym of proprietress; that is, proprietor is a word with a broader meaning than proprietress:

Other hypernyms of proprietress include owner, adult female, woman.

proprietress (noun)	proprietor (noun)
a woman proprietor	(law) someone who owns (is legal possessor of) a business