seigneury vs acres

seigneury and acres both are nouns.

Word	Noun	Adjective	Verb	Adverb
seigneury	Yes	No	No	No
acres	Yes	No	No	No

As nouns, acres is a hypernym of seigneury; that is, acres is a word with a broader meaning than seigneury:

seigneury: the estate of a seigneur
acres: extensive landed property (especially in the country) retained by the owner for his own use

Other hypernyms of seigneury include demesne, estate, land, landed estate.

seigneury (noun)	acres (noun)
the position and authority of a feudal lord	extensive landed property (especially in the country) retained by the owner for his own use
the estate of a seigneur