WordNet sense 1 (characterized by intense emotion):

ardent, burning, fervent, fervid, impassioned, perfervid, torrid

WordNet sense 2 (having or expressing strong emotions):

passionate

WordNet sense 3 (very intense):

flaming

WordNet sense 4 (extended meanings; especially of psychological heat; marked by intensity or vehemence especially of passion or enthusiasm):

hot

WordNet sense 5 (like or suggestive of fire):

igneous