WordNet (r) 3.0 (2006):

flame up
    v 1: burn brightly; "Every star seemed to flare with new
         intensity" [syn: flare, flame up, blaze up, burn
         up]

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "flame up":
   bake, be angry, be excitable, be in heat, bellow, blaze, blaze up,
   bloom, blow a gasket, blow up, boil, broil, burn, catch fire,
   catch the infection, choke, combust, come apart, cook,
   excite easily, explode, fire up, flame, flare, flare up, flash up,
   flicker, flip, flush, fry, gasp, get excited, glow,
   go into hysterics, have a tantrum, hit the ceiling, ignite,
   incandesce, kindle, pant, parch, radiate heat, rage, ramp, rant,
   rant and rave, rave, roast, run a temperature, scald, scorch,
   seethe, shimmer with heat, simmer, smolder, smother, spark,
   spunk up, steam, stew, stifle, storm, suffocate, sweat, swelter,
   take fire, toast, turn a hair