WordNet sense 1 (pain that feels hot as if it were on fire):

burn

WordNet sense 2 (a process in which a substance reacts with oxygen to give heat and light):

combustion

WordNet sense 3 (characterized by intense emotion):

ardent, fervent, fervid, fiery, impassioned, perfervid, torrid

WordNet sense 4 (having or expressing strong emotions):

passionate

WordNet sense 5 (causing physical or psychological pain):

painful

WordNet sense 6 (of great significance or value):

important, of import

WordNet sense 7 (used of physical heat; having a high or higher than desirable temperature or giving off heat or feeling or causing a sensation of heat or burning):

hot

WordNet sense 8 (execution by electricity):

electrocution

WordNet sense 9 (execution by fire):

burning at the stake

WordNet sense 10 (heated, driven, or produced by burning fuel):

fueled

WordNet sense 11 (lighted up by or as by fire or flame):

ablaze, alight, blazing, flaming, afire, aflame, aflare, on fire

WordNet sense 12 (set afire or burning):

lighted