Synonyms of headstrongly

2 Syllables
staunchly, rashly, firmly
3 Syllables
willfully, headily, doggedly, stolidly, steadfastly, mulishly, fixedly
4 Syllables
persistently, inflexibly, unflinchingly, unthinkingly, tenaciously, bullheadedly, intractably, pigheadedly, resistantly, resolvedly, unyieldingly
5 Syllables
unrelentingly, obdurately, determinedly, indomitably, resolutely, unreasoningly, obstinately, unwaveringly, unimpressibly, precipitously, precipitantly, unpreparedly, pertinaciously, contumaciously, recalcitrantly, unamenably, unreasonably
6 Syllables
opinionatedly