Synonyms of ill-considered

1 Syllable

bold, rash, brash, wild

2 Syllables

tomfool, headstrong, headlong, foolish, loopy, thoughtless, heedless, hasty, daring, fiery, frenzied, furious, madcap, slapdash, dippy, reckless

3 Syllables

frivolous, light-minded, nonserious, imprudent, softheaded, indiscreet, foolhardy, halfcocked, hotheaded, ill-judged, unwiser, incautious, short-sighted, near-sighted, shortsighted, unwary, unthinking, impetuous, venturous, audacious, unguarded

4 Syllables

unprepared, lamebrained, irrational, imbecilic, impulsive, premature, ill-advised, unsagacious, injudicious, overhasty, passionate, improvident, immature, temerarious, adventurous, devil-may-care, harebrained, harum-scarum, precipitant, uncareful, determined, uncircumspect

5 Syllables

irresponsible, unadvisable, insuppressible, precipitate, unconsidered, venturesome, unreflective