immovable vs acres

immovable and acres both are nouns.

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

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

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

Other hyponyms of immovable include demesne, estate, land, landed estate, land, dead hand, mortmain.

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

immovable (adjective)	acres (adjective)
not able or intended to be moved