Firebold - It's fire. That's bold.
Firebowl - Useful against Firepins.
Firebelt - Hope your pants aren't flammable.
Tirebolt - Made by Firestone no less.
Direbolt - Like a bolt, but bigger and meaner.
Liarbolt - Original creator not responsible for overly enlarged noses.
Firedolt - A dolt that's lit himself on fire.
Firecolt - .....Ponyta?
Filebolt - This is what you get when you teach lawyers spellcasting.
Mirebolt - Swampish.
Irebolt - Annoying.
Firemolt - .....This sounds painful.