WordNet (r) 3.0 (2006):

throw together
    v 1: produce shoddily, without much attention to detail [syn:
         fudge together, throw together]
    2: bring into random order [syn: scramble, jumble, throw
       together]

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "throw together":
   ad-lib, admix, alloy, amalgamate, bat out, bemingle, blend, botch,
   bungle, coalesce, combine, commingle, commix, compose, compound,
   concoct, conglomerate, cook up, dash off, do anyhow, do by halves,
   do carelessly, do offhand, emulsify, extemporize, fake, fake up,
   fudge up, fuse, hash, homogenize, immingle, immix, improvisate,
   improvise, integrate, interblend, interlace, interlard,
   intermingle, intermix, intertwine, interweave, jumble, jury-rig,
   knead, knock off, knock out, knock together, lash up, make up,
   merge, mingle, mingle-mangle, mix, mix up, patch, patch together,
   patch up, play by ear, pound out, rough out, roughcast, roughhew,
   scramble, scrap the plan, shuffle, slap up, stir up, strike off,
   syncretize, throw off, toss off, toss out, toss together,
   trifle with, vamp, whip up, whomp up, wing it, work