The Collaborative International Dictionary of English v.0.48:

Overthrow \O`ver*throw"\, v. t. [imp. Overthrew; p. p.
   Overthrown; p. pr. & vb. n. Overthrowing.]
   1. To throw over; to overturn; to upset; to turn upside down.
      [1913 Webster]

            His wife overthrew the table.         --Jer. Taylor.
      [1913 Webster]

   2. To cause to fall or to fail; to subvert; to defeat; to
      make a ruin of; to destroy; as, to overthrow a government.
      [1913 Webster +PJC]

            When the walls of Thebes he overthrew. --Dryden.
      [1913 Webster]

            [Gloucester] that seeks to overthrow religion.
                                                  --Shak.
      [1913 Webster]

   3. (Baseball) To throw (a baseball) beyond; to throw too high
      and too far; to overshoot[1]; as, the shortstop overthrew
      the first baseman.
      [PJC]

   Syn: To demolish; overturn; prostrate; destroy; ruin;
        subvert; overcome; conquer; defeat; discomfit; vanquish;
        beat; rout.
        [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

82 Moby Thesaurus words for "overthrown":
   all up with, ausgespielt, bankrupt, beat, beaten, belied, bested,
   blasted, blighted, broken, confounded, confuted, defeated,
   deflated, denied, desolated, destroyed, devastated, discarded,
   discomfited, discredited, dismissed, disproved, disputed, done for,
   done in, down, down-and-out, exploded, exposed, fallen, finished,
   fixed, floored, gone to pot, hors de combat, impugned, in ruins,
   invalidated, irremediable, kaput, lambasted, lathered, licked,
   negated, negatived, on the skids, outdone, overborne, overcome,
   overmastered, overmatched, overpowered, overridden, overturned,
   overwhelmed, panicked, punctured, put to rout, ravaged, refuted,
   rejected, routed, ruined, ruinous, scattered, settled, shown up,
   silenced, skinned, skinned alive, spoiled, stampeded, trimmed,
   trounced, undone, upset, wasted, whelmed, whipped, worsted,
   wrecked