realty vs landed estate

realty and landed estate both are nouns.

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

As nouns, landed estate is a hyponym of realty; that is, landed estate is a word with a more specific, narrower meaning than realty:

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

Other hyponyms of realty include acres, demesne, estate, land, land, dead hand, mortmain.

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