The Collaborative International Dictionary of English v.0.48:

Incinerate \In*cin"er*ate\, [LL. incineratus, p. p. of
   incinerare to incinerate; L. pref. in- in + cinis, cineris,
   ashes.]
   Reduced to ashes by burning; thoroughly consumed by fire.
   [Obs.] --Bacon.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Incinerate \In*cin"er*ate\, v. t. [imp. & p. p. Incinerated;
   p. pr. & vb. n. Incinerating.]
   To burn to ashes; to consume by fire; to burn. --Bacon.
   [1913 Webster]

         It is the fire only that incinerates bodies. --Boyle.
   [1913 Webster]

WordNet (r) 3.0 (2006):

incinerate
    v 1: become reduced to ashes; "The paper incinerated quickly"
    2: cause to undergo combustion; "burn garbage"; "The car burns
       only Diesel oil" [syn: burn, incinerate]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "incinerate":
   blow to pieces, blow up, brain, bring down, bring to ruin, burn,
   burn down, burn to death, burn up, condemn, confound, consume,
   cremate, cut down, cut to pieces, damn, deal a deathblow,
   deal destruction, decimate, depredate, desolate, despoil, destroy,
   devastate, devour, disintegrate, dissolve, drop, engorge, fell,
   frag, give the quietus, gobble, gobble up, gun down, gut,
   gut with fire, havoc, incendiarize, jugulate, lapidate,
   lay in ruins, lay low, lay waste, pistol, poleax, ravage,
   reduce to ashes, riddle, ruin, ruinate, shipwreck, shoot,
   shoot down, shoot to death, shotgun, silence, stab to death, stone,
   stone to death, strike dead, swallow up, throw into disorder,
   unleash destruction, unleash the hurricane, upheave, vandalize,
   vaporize, waste, wrack, wreak havoc, wreck