plantation vs landed estate

plantation and landed estate both are nouns.

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

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

plantation: an estate where cash crops are grown on a large scale (especially in tropical areas)
landed estate: extensive landed property (especially in the country) retained by the owner for his own use

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

plantation (noun)	landed estate (noun)
garden consisting of a small cultivated wood without undergrowth	extensive landed property (especially in the country) retained by the owner for his own use
an estate where cash crops are grown on a large scale (especially in tropical areas)