[1] : WordNet (r) 2.0

blot out
     v : make undecipherable or imperceptible by obscuring or
         concealing; "a hidden message"; "a veiled threat" syn: obscure,
          obliterate, veil, hide
see also:
obscure obliterate veil hide 

[2] : Moby Thesaurus II by Grady Ward, 1.0

91 moby thesaurus words for "blot out":
   abate, abbreviate, abolish, abridge, annul, becloud, bedarken,
   bedim, begloom, black, black out, blacken, blast, block the light,
   blot, blue-pencil, bowdlerize, brown, bump off, cancel,
   cast a shadow, censor, cloud, cloud over, croak, cross out, cut,
   darken, darken over, dele, delete, dim, dim out, do in, eclipse,
   edit, edit out, efface, encloud, encompass with shadow, eradicate,
   erase, expunge, expurgate, exterminate, extinguish, extirpate, fix,
   get, give the business, gloom, gun down, hit, ice, kill, lay out,
   murk, obfuscate, obliterate, obnubilate, obscure, obumbrate,
   occult, occultate, off, omit, overcast, overcloud, overshadow,
   polish off, raze, rescind, root out, rub out, rule out, scratch,
   scratch out, settle, shade, shadow, somber, sponge, sponge out,
   strike, strike off, strike out, take care of, void, waste,
   wipe out, zap

Bale Out >> B Words
Bale Out, definition of term: Bale Out
bale+out_pag1.html

Bawl Out >> B Words
Bawl Out, definition of term: Bawl Out
bawl+out_pag1.html

Bail Out >> B Words
Bail Out, definition of term: Bail Out
bail+out_pag1.html

Back Out >> B Words
Back Out, definition of term: Back Out
back+out_pag1.html

Air Out >> A Words
Air Out, definition of term: Air Out
air+out_pag1.html

Ask Out >> A Words
Ask Out, definition of term: Ask Out
ask+out_pag1.html

Act Out >> A Words
Act Out, definition of term: Act Out
act+out_pag1.html