archduchess vs princess

archduchess and princess both are nouns.

Word	Noun	Adjective	Verb	Adverb
archduchess	Yes	No	No	No
princess	Yes	No	No	No

As nouns, princess is a hypernym of archduchess; that is, princess is a word with a broader meaning than archduchess:

archduchess: a wife or widow of an archduke or a princess of the former ruling house of Austria
princess: a female member of a royal family other than the queen (especially the daughter of a sovereign)

archduchess (noun)	princess (noun)
a wife or widow of an archduke or a princess of the former ruling house of Austria	a female member of a royal family other than the queen (especially the daughter of a sovereign)