Synonym for fiery is "hot-tempered"

ablaze [adjective]

means "burning"
blazing, on fire, lighted, aflame, flaming, fiery

afire [adjective]

means "burning"
on fire, ablaze, ignited, fiery, inflamed, aflame

aflame [adjective]

means "burning"
blazing, on fire, lighted, ablaze, flaming, fiery

ardent [adjective]

means "characteristic"
fiery, intense

blazing [adjective]

means "burning"
ablaze, on fire, lighted, aflame, flaming, fiery

blistering [adjective]

means "heated"
flaming, burning, fiery, scorching, boiling, hot

burning [adjective]

means "afire"
on fire, ablaze, ignited, fiery, inflamed, aflame

combustible [adjective]

means "excitable"
passionate, fiery, volatile

excitable [adjective]

means "hasty"
fiery, fretful, irascible, irritable, peevish, petulant

fevered [adjective]

means "feverish"
flushed, fiery

feverish [adjective]

means "fevered"
flushed, fiery

flaming [adjective]

means "burning"
afire, fervent, fervid, fiery, glowing, heated

hasty [adjective]

means "excitable"
fiery, fretful, irascible, irritable, peevish, petulant

heated [adjective]

means "fervent"
avid, ardent, intense, excited, bitter, fiery

hellish [adjective]

means "diabolical"
devilish, infernal, stygian, fiery, evil

hot [adjective]

means "property"
heated, flaming, burning, fiery, scorching, boiling

igneous [adjective]

means "produced by volcanic heat"
molten, fiery, slag, bright

lighted [adjective]

means "burning"
blazing, flaming, fiery, ignited, afire, ablaze

lurid [adjective]

means "passionate"
fiery, intense, fierce, sensational, glaring, vivid

mettlesome [adjective]

means "high spirited"
spirited, spunky, vigourous, active, high-spirited, fiery

on fire [adjective]

means "afire"
burning, ablaze, ignited, fiery, inflamed, aflame

passionate [adjective]

means "hot-headed"
choleric, fiery, hasty, irascible, quick-tempered, short-tempered

scalding [adjective]

means "extremely hot"
hot, fiery, blistering, scorching, sweltering, burning

scorching [adjective]

means "extremely hot"
hot, fiery, blistering, scalding, sweltering, burning

short-tempered [adjective]

means "hot-headed"
choleric, fiery, hasty, irascible, quick-tempered, passionate

torrid [adjective]

means "tropical"
steaming, sweltering, burning, fiery, hot, scorching

vehement [adjective]

means "passionate"
torrid, ardent, fierce, extreme, impassioned, fiery

waspish [adjective]