hotheaded (adj.)
- accident-prone
- ardent
- brash
- breakneck
- careless
- combustible
- daredevil
- desperate
- devil-may-care
- explosive
- fanatic
- fierce
- fiery
- flaming
- foolhardy
- furious
- hard-core
- harum-scarum
- hasty
- headlong
- heated
- heedless
- hot
- hot-tempered
- hurried
- ill-advised
- impetuous
- incautious
- inconsiderate
- inflamed
- mad
- madcap
- overeager
- overenthusiastic
- overzealous
- passionate
- peppery
- precipitant
- precipitate
- precipitous
- quick
- quick-tempered
- rash
- reckless
- red-hot
- scorching
- short-tempered
- slapdash
- spunky
- stormy
- tempestuous
- thoughtless
- vehement
- violent
- volatile
- volcanic
- wanton
- white-hot
- wild
- zealous