landed estate vs demesne

landed estate and demesne both are nouns.

Word	Noun	Adjective	Verb	Adverb
landed estate	Yes	No	No	No
demesne	Yes	No	No	No

As nouns, landed estate and demesne are synonyms defined as:

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

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

landed estate (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