plantation vs orangery

plantation and orangery both are nouns.

Word	Noun	Adjective	Verb	Adverb
plantation	Yes	No	No	No
orangery	Yes	No	No	No

As nouns, orangery is a hyponym of plantation; that is, orangery is a word with a more specific, narrower meaning than plantation:

plantation: an estate where cash crops are grown on a large scale (especially in tropical areas)
orangery: a place where oranges are grown; a plantation of orange trees in warm climes or a greenhouse in cooler areas

plantation (noun)	orangery (noun)
garden consisting of a small cultivated wood without undergrowth	a place where oranges are grown; a plantation of orange trees in warm climes or a greenhouse in cooler areas
an estate where cash crops are grown on a large scale (especially in tropical areas)