| unwatchful(adjective, careless, cold, forget, bold) |
| absent(adjective, dull, careless, indifferent, stupid) |
| boorish(adjective, sharp, rough, careless, vulgar) |
| cursory(adjective, careless, indifferent, casual, quick) |
| daredevil(adjective, wild, rash, reckless, impetuous) |
| distracted(adjective, careless, indifferent, apathetic, inattentive) |
| frivolous(adjective, silly, crazy, vague, unreliable) |
| giddy(adjective, careless, silly, immoral, vague) |
| hard-hearted(adjective, mean, nasty, ill, hostile) |
| harum-scarum(adjective, feature, state, condition, trait) |
| headlong(adjective, rude, careless, wild, quick) |
| heartless(adjective, mean, ill, hostile, unfriendly) |
| illogical(adjective, vague, irrational, arbitrary, perverse) |
| inadvisable(adjective, foolish, rash, risky, ill-advised) |
| inexpedient(adjective, careless, foolish, rash, unwise) |
| loony(adjective, careless, silly, stupid, unwise) |
| misguided(adjective, foolish, rash, unwise, risky) |
| nonchalant(adjective, feature, state, careless, indifferent) |
| nutty(silly, unwise) |
| obtuse(adjective, careless, silly, foolish, stupid) |