WordNet (r) 3.0 (2006):

give off
    v 1: have as a by-product; "The big cities gave off so many
         wonderful American qualities"
    2: give off, send forth, or discharge; as of light, heat, or
       radiation, vapor, etc.; "The ozone layer blocks some harmful
       rays which the sun emits" [syn: emit, give out, give
       off] [ant: absorb, take in]

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "give off":
   aerate, aerify, atomize, bleed, blow, breathe out, carbonate,
   chlorinate, discharge, distill, effuse, egest, eliminate, emit,
   etherify, etherize, evacuate, evaporate, excrete, exfiltrate,
   exhale, exhaust, expire, extravasate, exudate, exude, filter,
   filtrate, fluidize, fractionate, fume, fumigate, gasify, give out,
   give vent to, hydrogenate, issue, leach, let out, lixiviate, ooze,
   open the floodgates, open the sluices, oxygenate, pass, percolate,
   perfume, puff, reek, release, secrete, seep, send out, smoke,
   spray, steam, strain, sublimate, sublime, throw, throw off,
   transpire, transude, vapor, vaporize, void, volatilize, weep