demesne vs immovable

demesne and immovable both are nouns.

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

As nouns, immovable is a hypernym of demesne; that is, immovable is a word with a broader meaning than demesne:

demesne: extensive landed property (especially in the country) retained by the owner for his own use
immovable: property consisting of houses and land

Other hypernyms of demesne include real estate, real property, realty.

demesne (noun)	immovable (noun)
territory over which rule or control is exercised	property consisting of houses and land
extensive landed property (especially in the country) retained by the owner for his own use

demesne (adjective)	immovable (adjective)
	not able or intended to be moved