Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

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 [Phys.]. summer, dog days; canicular days†; baking &c 384; heat, white heat, tropical heat, Afric heat†, Bengal heat†, summer heat, blood heat; sirocco, simoom; broiling sun; insolation; warming &c 384. sun &c (luminary) 423. [Science of heat] pyrology†; thermology†, thermotics†, thermodynamics; thermometer &c 389. [thermal units] calorie, gram-calorie, small calorie; kilocalorie, kilogram calorie, large calorie; British Thermal Unit, B.T.U.; therm, quad. [units of temperature] degrees Kelvin, kelvins, degrees centigrade, degrees Celsius; degrees Fahrenheit. V. be hot &c adj.; glow, flush, sweat, swelter, bask, smoke, reek, stew, simmer, seethe, boil, burn, blister, broil, blaze, flame; smolder; parch, fume, pant. heat &c (make hot) 384; recalesce†; thaw, give. Adj. 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 &c v.; baking &c 384. red hot, white hot, smoking hot, burning &c v.. 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 &c v.; 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†. Phr. not a breath of air; whirlwinds of tempestuous fire [Paradise Lost].