The Collaborative International Dictionary of English v.0.48:

Thrall \Thrall\, a.
   Of or pertaining to a thrall; in the condition of a thrall;
   bond; enslaved. [Obs.] --Spenser.
   [1913 Webster]

         The fiend that would make you thrall and bond.
                                                  --Chaucer.
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The Collaborative International Dictionary of English v.0.48:

Thrall \Thrall\, v. t.
   To enslave. [Obs. or Poetic] --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Thrall \Thrall\, n. [OE. thral, [thorn]ral, Icel.
   [thorn]r[ae]ll, perhaps through AS. [thorn]r[=ae]l; akin to
   Sw. tr[aum]l, Dan. tr[ae]l, and probably to AS.
   [thorn]r[ae]gian to run, Goth. [thorn]ragjan, Gr. tre`chein;
   cf. OHG. dregil, drigil, a servant.]
   1. A slave; a bondman. --Chaucer.
      [1913 Webster]

            Gurth, the born thrall of Cedric.     --Sir W.
                                                  Scott.
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   2. Slavery; bondage; servitude; thraldom. --Tennyson.
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            He still in thrall
            Of all-subdoing sleep.                --Chapman.
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   3. A shelf; a stand for barrels, etc. [Prov. Eng.]
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WordNet (r) 3.0 (2006):

thrall
    n 1: the state of being under the control of another person
         [syn: bondage, slavery, thrall, thralldom,
         thraldom]
    2: someone held in bondage

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "thrall":
   absolutism, bond service, bondage, bondmaid, bondman, bondslave,
   bondsman, bondswoman, captive, captivity, chattel, chattel slave,
   churl, concubine, control, debt slave, debt slavery,
   deprivation of freedom, disenfranchisement, disfranchisement,
   domination, enslavement, enthrallment, feudalism, feudality,
   galley slave, helot, helotism, helotry, homager, indentureship,
   liege, liege man, liege subject, odalisque, peon, peonage,
   restraint, serf, serfdom, serfhood, servant, servility, servitude,
   slave, slavery, subject, subjection, subjugation, theow, thralldom,
   tyranny, vassal, vassalage, villein, villenage, yoke



U.S. Gazetteer Places (2000):

Thrall, TX -- U.S. city in Texas
   Population (2000):    710
   Housing Units (2000): 264
   Land area (2000):     0.406467 sq. miles (1.052744 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.406467 sq. miles (1.052744 sq. km)
   FIPS code:            72824
   Located within:       Texas (TX), FIPS 48
   Location:             30.588640 N, 97.298707 W
   ZIP Codes (1990):     76578
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Thrall, TX
    Thrall