barony vs demesne

barony and demesne both are nouns.

Word	Noun	Adjective	Verb	Adverb
barony	Yes	No	No	No
demesne	Yes	No	No	No

As nouns, demesne is a hypernym of barony; that is, demesne is a word with a broader meaning than barony:

Other hypernyms of barony include domain, land.

As nouns, demesne is a hypernym of barony; that is, demesne is a word with a broader meaning than barony:

barony: the estate of a baron
demesne: extensive landed property (especially in the country) retained by the owner for his own use

Other hypernyms of barony include acres, estate, land, landed estate.

barony (noun)	demesne (noun)
the domain of a baron	territory over which rule or control is exercised
the estate of a baron	extensive landed property (especially in the country) retained by the owner for his own use
the rank or dignity or position of a baronet or baroness