princess vs aristocrat

princess and aristocrat both are nouns.

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

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

princess: a female member of a royal family other than the queen (especially the daughter of a sovereign)
aristocrat: a member of the aristocracy

Other hypernyms of princess include blue blood, patrician, adult female, woman.

princess (noun)	aristocrat (noun)
a female member of a royal family other than the queen (especially the daughter of a sovereign)	a member of the aristocracy