Crown land vs landed estate

Crown land and landed estate both are nouns.

Word	Noun	Adjective	Verb	Adverb
Crown land	Yes	No	No	No
landed estate	Yes	No	No	No

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

Crown land: land that belongs to the Crown
landed estate: extensive landed property (especially in the country) retained by the owner for his own use

Other hypernyms of Crown land include acres, demesne, estate, land.

Crown land (noun)	landed estate (noun)
land that belongs to the Crown	extensive landed property (especially in the country) retained by the owner for his own use