The Collaborative International Dictionary of English v.0.48:

Erase \E*rase"\ ([-e]*r[=a]s"), v. t. [imp. & p. p. Erased
   ([-e]*r[=a]st"); p. pr. & vb. n.. Erasing.] [L. erasus, p.
   p. of eradere to erase; e out + radere to scrape, scratch,
   shave. See Rase.]
   1. To rub or scrape out, as letters or characters written,
      engraved, or painted; to efface; to expunge; to cross out;
      as, to erase a word or a name.
      [1913 Webster]

   2. Fig.: To obliterate; to expunge; to blot out; -- used of
      ideas in the mind or memory. --Burke.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

89 Moby Thesaurus words for "erase":
   abbreviate, ablate, abolish, abrade, abrase, abridge, annul, bark,
   black out, blast, blot, blot out, blue-pencil, bowdlerize,
   bump off, cancel, censor, chafe, croak, cross, cross out, cut,
   dele, delete, destroy, disannul, do in, edit, edit out, efface,
   eliminate, eradicate, erode, expunge, expurgate, file, fix, fray,
   frazzle, fret, gall, get, get rid of, give the business, gnaw,
   gnaw away, grate, graze, grind, gun down, hit, ice, kill, lay out,
   negate, nullify, obliterate, off, omit, polish off, rasp, raze,
   remove, rescind, rub away, rub off, rub out, rule out, scour,
   scrape, scratch, scratch out, scrub, scuff, settle, skin, sponge,
   sponge out, strike, strike off, strike out, take care of, void,
   waste, wear, wear away, wipe out, withdraw, zap