The Collaborative International Dictionary of English v.0.48:

Realty \Re"al*ty\ (-t[y^]), n. [OF. r['e]alt['e], LL. regalitas,
   fr. L. regalis. See Regal.]
   1. Royalty. [Obs.] --Chaucer.
      [1913 Webster]

   2. Loyalty; faithfulness. [R.] --Milton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Realty \Re"al*ty\, n. [Contr. from 1st Reality.]
   1. Reality. [Obs.] --Dr. H. More.
      [1913 Webster]

   2. (Law)
      (a) Immobility, or the fixed, permanent nature of real
          property; as, chattels which savor of the realty; --
          so written in legal language for reality.
      (b) Real estate; a piece of real property. --Blackstone.
          [1913 Webster]

WordNet (r) 3.0 (2006):

realty
    n 1: property consisting of houses and land [syn: real
         property, real estate, realty, immovable]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "realty":
   acres, chattels real, demesne, domain, grounds, honor, land,
   landed property, lands, lot, lots, manor, messuage, parcel, plat,
   plot, praedium, property, quadrat, real estate, real property,
   tenements, toft



Bouvier's Law Dictionary, Revised 6th Ed (1856):

REALTY. An abstract of real, as distinguished from personalty. Realty
relates to lands and tenements, rents or other hereditaments. Vide Real
Property.