烈 violently intense

LET'S light an intense fire directly under that row of posers!

intense ★★☆☆☆
強 (burly) + 烈 (violently intense) = 強烈 (intense)

intense, furious : close to 激しい　（はげしい）： a punch, a violent speech. Emphasizes the extent of emotion invested in it.

fierce ★★☆☆☆
猛 (fierce) + 烈 (violently intense) = 猛烈 (fierce )

severe, violent, terrible, fierce -

Unlike the related word 強烈（きょうれつ）、　もうれつ is usually used about natural phenomena: a fierce storm; a violent wild-fire. The toboggan moving at a scary intense velocity downhill. Also can be used with emotions: A violent argument after someone got caught cheating.

passionate enthusiasm ★☆☆☆☆
熱 (hot thing / fever) + 烈 (violently intense) = 熱烈 (passionate enthusiasm)

fervent, passionate enthusiasm.