| negligent(adjective, careless, bold, thoughtless, impulsive) |
| nonsensical(impractical, half-baked, doomed) |
| not careful(expression, adjective, careless, bold, thoughtless) |
| off guard(expression, adjective, careless, bold, thoughtless) |
| off the deep end(expression, adjective, careless, foolish, thoughtless) |
| overhasty(adjective, careless, foolish, thoughtless, rash) |
| pay no mind(expression, idiom, careless, bold, thoughtless) |
| playing with fire(expression, idiom, careless, foolish, bold) |
| precipitate(adjective, careless, bold, thoughtless, wary) |
| preposterous(impractical, half-baked, doomed) |
| reasonless |
| regardless(adjective, careless, bold, thoughtless, impulsive) |
| short-sighted(adjective, foolish, thoughtless, unwise, risky) |
| tactless(adjective, stupid, inappropriate, unwise) |
| temerarious(adjective, careless, foolish, thoughtless, rash) |
| unadvisable(adjective, careless, foolish, thoughtless, rash) |
| unalert(adjective, careless, bold, thoughtless, impulsive) |
| undiscerning |
| undiscriminating |
| unguarded(adjective, careless, bold, thoughtless, wary) |