acres vs realty

acres and realty both are nouns.

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

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

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

Other hypernyms of acres include immovable, real estate, real property.

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