acres vs demesne

acres and demesne both are nouns.

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

As nouns, acres and demesne are synonyms defined as:

acres and demesne: extensive landed property (especially in the country) retained by the owner for his own use

Other synonyms of acres include estate, land, landed estate.

acres (noun)	demesne (noun)
extensive landed property (especially in the country) retained by the owner for his own use	territory over which rule or control is exercised
	extensive landed property (especially in the country) retained by the owner for his own use