Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "schlock":
   abominable, arrant, atrocious, awful, base, beastly,
   beneath contempt, blameworthy, brutal, contemptible, deplorable,
   despicable, detestable, dire, disgusting, dreadful, egregious,
   enormous, fetid, filthy, flagrant, foul, fulsome, grievous, gross,
   hateful, heinous, horrible, horrid, infamous, irregular,
   lamentable, loathsome, lousy, monstrous, nasty, nefarious, noisome,
   notorious, obnoxious, odious, offensive, outrageous, pitiable,
   pitiful, rank, regrettable, reprehensible, repulsive, rotten, sad,
   scandalous, schmatte, scurvy, second, shabby, shameful, shocking,
   shoddy, sordid, squalid, terrible, third, too bad, unclean, vile,
   villainous, woeful, worst, worthless, wretched