The Collaborative International Dictionary of English v.0.48:

Scot \Scot\, n.
   A name for a horse. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scot \Scot\, n. [Cf. L. Skoti, pl., AS. Scotta, pl. Skottas,
   Sceottas.]
   A native or inhabitant of Scotland; a Scotsman, or Scotchman.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scot \Scot\, n. [Icel. skot; or OF. escot, F. ['e]cot, LL.
   scottum, scotum, from a kindred German word; akin to AS.
   scot, and E. shot, shoot; cf. AS. sce['o]tan to shoot, to
   contribute. See Shoot, and cf. Shot.]
   A portion of money assessed or paid; a tax or contribution; a
   mulct; a fine; a shot.
   [1913 Webster]

   Scot and lot, formerly, a parish assessment laid on
      subjects according to their ability. [Eng.] --Cowell. Now,
      a phrase for obligations of every kind regarded
      collectivelly.
      [1913 Webster]

            Experienced men of the world know very well that it
            is best to pay scot and lot as they go along.
                                                  --Emerson.
      [1913 Webster] Scotal

WordNet (r) 3.0 (2006):

Scot
    n 1: a native or inhabitant of Scotland [syn: Scot,
         Scotsman, Scotchman]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "scot":
   account, admission, admission fee, allowance, anchorage,
   assessment, bill, blackmail, blood money, brokerage, carfare,
   cellarage, charge, charges, cover charge, demand, dockage, dues,
   emolument, entrance fee, exaction, exactment, fare, fee, footing,
   hire, hush money, initiation fee, license fee, mileage, pilotage,
   portage, reckoning, retainer, retaining fee, salvage, scot and lot,
   shot, stipend, storage, toll, towage, tribute, wharfage