ambassadress vs embassador

ambassadress and embassador both are nouns.

Word	Noun	Adjective	Verb	Adverb
ambassadress	Yes	No	No	No
embassador	Yes	No	No	No

As nouns, embassador is a hypernym of ambassadress; that is, embassador is a word with a broader meaning than ambassadress:

ambassadress: a woman ambassador
embassador: a diplomat of the highest rank; accredited as representative from one country to another

Other hypernyms of ambassadress include ambassador, adult female, woman.

ambassadress (noun)	embassador (noun)
a woman ambassador	a diplomat of the highest rank; accredited as representative from one country to another