WordNet (r) 3.0 (2006):

tear apart
    v 1: express a totally negative opinion of; "The critics panned
         the performance" [syn: pan, tear apart, trash]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "tear apart":
   atomize, break to pieces, carp, catch at straws, cavil, cleave,
   cut up, defoliate, demolish, denude, disassemble, disintegrate,
   dismantle, dismember, draw and quarter, fault-find, find fault,
   flay, fragment, lacerate, maim, make mincemeat of, mangle,
   mutilate, nitpick, peel, pettifog, pick holes, pick to pieces,
   pull apart, pull in pieces, pull to pieces, pulverize, quibble,
   reduce to rubble, rend, shatter, shred, skin, smash, split, strip,
   sunder, take apart, take exception, tear to pieces, tear to shreds,
   tear to tatters, total, unbuild, undo, unmake, wrack up, wreck