wildfire

• POS: Noun
• HYPHEN: wild=fire

CIDE DICTIONARY

wildfire, n. 

•  A composition of inflammable materials, which, kindled, is very hard to quench; Greek fire.  [1913 Webster]

  "Brimstone, pitch, wildfire . . . burn cruelly, and hard to quench."  [1913 Webster]
•  An old name for erysipelas.  [1913 Webster]
•  A sort of lightning unaccompanied by thunder.  [1913 Webster]

OXFORD DICTIONARY

wildfire, n. hist.
1 a combustible liquid, esp. Greek fire, formerly used in warfare.
2 = WILL-O'-THE-WISP.

Idiom

spread like wildfire spread with great speed.

ROGET THESAURUS

wildfire

Heat

N heat, caloric, temperature, warmth, fervor, calidity, incalescence, incandescence, glow, flush, fever, hectic, phlogiston, fire, spark, scintillation, flash, flame, blaze, bonfire, firework, pyrotechnics, pyrotechny, wildfire, sheet of fire, lambent flame, devouring element, adiathermancy, recalescence, summer, dog days, canicular days, baking, heat, white heat, tropical heat, Afric heat, Bengal heat, summer heat, blood heat, sirocco, simoom, broiling sun, insolation, warming, sun, pyrology, thermology, thermotics, thermodynamics, thermometer, calorie, gram-calorie, small calorie, kilocalorie, kilogram calorie, large calorie, British Thermal Unit, B, T, U, therm, quad, degrees Kelvin, kelvins, degrees centigrade, degrees Celsius, degrees Fahrenheit, hot, warm, mild, genial, tepid, lukewarm, unfrozen, thermal, thermic, calorific, fervent, fervid, ardent, aglow, sunny, torrid, tropical, estival, canicular, steamy, close, sultry, stifling, stuffy, suffocating, oppressive, reeking, baking, red hot, white hot, smoking hot, burning, hot, piping hot, like a furnace, like an oven, burning, hot as fire, hot as pepper, hot enough to roast an ox, hot enough to boil an egg, fiery, incandescent, incalescent, candent, ebullient, glowing, smoking, live, on fire, dazzling, in flames, blazing, in a blaze, alight, afire, ablaze, unquenched, unextinguished, smoldering, in a heat, in a glow, in a fever, in a perspiration, in a sweat, sudorific, sweltering, sweltered, blood hot, blood warm, warm as a toast, warm as wool, volcanic, plutonic, igneous, isothermal, isothermic, isotheral, not a breath of air, whirlwinds of tempestuous fire.