barony vs domain

barony and domain both are nouns.

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

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

Other hypernyms of barony include demesne, land.

barony (noun)	domain (noun)
the domain of a baron	the content of a particular field of knowledge
the estate of a baron	people in general; especially a distinctive group of people with some shared interest
the rank or dignity or position of a baronet or baroness	(mathematics) the set of values of the independent variable for which a function is defined
	territory over which rule or control is exercised
	a particular environment or walk of life