The Collaborative International Dictionary of English v.0.48:

Vaporize \Vap"o*rize\ (v[a^]p"[-o]*r[imac]z or
   v[=a]"p[~e]r*[imac]z), v. t. [imp. & p. p. Vaporized
   (-r[imac]zd); p. pr. & vb. n. Vaporizing
   (-r[imac]`z[i^]ng).] [Cf. F. vaporiser.]
   To convert into vapor, as by the application of heat, whether
   naturally or artificially.
   [1913 Webster]

   Vaporizing surface. (Steam Boilers) See Evaporating
      surface, under Evaporate, v. t.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vaporize \Vap"o*rize\, v. i.
   To pass off in vapor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

vaporize
    v 1: kill with or as if with a burst of gunfire or electric
         current or as if by shooting; "in this computer game, space
         travellers are vaporized by aliens" [syn: zap,
         vaporize]
    2: turn into gas; "The substance gasified" [syn: gasify,
       vaporize, vaporise, aerify]
    3: lose or cause to lose liquid by vaporization leaving a more
       concentrated residue; "evaporate milk" [syn: evaporate,
       vaporize, vaporise]
    4: decrease rapidly and disappear; "the money vanished in las
       Vegas"; "all my stock assets have vaporized" [syn: vanish,
       fly, vaporize]

Moby Thesaurus II by Grady Ward, 1.0:

94 Moby Thesaurus words for "vaporize":
   aerate, aerify, atomize, blow to pieces, blow up, brain,
   bring down, bring to ruin, burn to death, carbonate, chlorinate,
   condemn, confound, consume, cut down, cut to pieces, damn,
   deal a deathblow, deal destruction, decimate, depredate, desolate,
   despoil, destroy, devastate, devour, disintegrate, dissolve,
   distill, drop, emit, engorge, etherify, etherize, evaporate,
   exhale, fell, fluidize, fractionate, frag, fume, fumigate, gasify,
   give off, give the quietus, gobble, gobble up, gun down, gut,
   gut with fire, havoc, hydrogenate, incinerate, jugulate, lapidate,
   lay in ruins, lay low, lay waste, oxygenate, perfume, pistol,
   poleax, ravage, reek, riddle, ruin, ruinate, send out, shipwreck,
   shoot, shoot down, shoot to death, shotgun, silence, smoke, spray,
   stab to death, steam, stone, stone to death, strike dead,
   sublimate, sublime, swallow up, throw into disorder,
   unleash destruction, unleash the hurricane, upheave, vandalize,
   volatilize, waste, wrack, wreak havoc, wreck