Synonyms of headstrong

1 Syllable
mule, rash
2 Syllables
willful, stubborn, hard-core, mulish, mullish, violent, hard-shell, heedless, naughtiest, murder, froward, naughtier, reckless, naughty, tough-nut, wayward
3 Syllables
hardline, ruffianly, uncompliant, unyielding, locked-in, imprudent, pig-headed, unhearing, death-defying, contrary, hard-nosed, foolhardy, strong-minded, hardheaded, bullheaded, strong-willed, pigheaded, wrongheaded, venturous, unruly, unpliable, hard-boiled, self-willed, hard-shelled, perverse
4 Syllables
intractable, impulsive, fanatical, obstinate, unbendable, adventurous, unrelaxed, indocile, refractory, precipitant, disobedient, determined, desperate
5 Syllables
unreasonable, uncontrollable, ungovernable, ill-considered, undisciplined, temperamental, unconsidered
6 Syllables
opinionative