demesne vs barony

demesne and barony both are nouns.

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

As nouns, barony is a hyponym of demesne; that is, barony is a word with a more specific, narrower meaning than demesne:

As nouns, barony is a hyponym of demesne; that is, barony is a word with a more specific, narrower meaning than demesne:

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

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