immovable 2 n: an item of immovable property (as land, standing timber, or a building)
a manufactured home placed upon a lot or tract of land shall be an immovable — Louisiana Revised Statutes; also: an interest or right (as a servitude) in an item of immovable property
a predial servitude is an incorporeal immovable — Louisiana Civil Code
— often used in pl. compare movable
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.