landed estate vs realty

landed estate and realty both are nouns.

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

As nouns, realty is a hypernym of landed estate; that is, realty is a word with a broader meaning than landed estate:

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

Other hypernyms of landed estate include immovable, real estate, real property.

landed estate (noun)	realty (noun)
extensive landed property (especially in the country) retained by the owner for his own use	property consisting of houses and land