demesne vs landed estate

demesne and landed estate both are nouns.

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

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

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

Other synonyms of demesne include acres, estate, land.

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