| unreliable(adjective, false, uncertainty, true, inadequate) |
| questionable(adjective, uncertainty, unpredictable, unreliable, fickle) |
| human(adjective, characteristic, able, prone, hominid) |
| uncertain(adjective, unpredictable, unreliable, fickle, variable) |
| faulty(adjective, incorrect, able, working, prone) |
| untrustworthy(adjective, uncertainty, unpredictable, unreliable, fickle) |
| imperfect(adjective, able, prone) |
| weak(adjective, false, inadequate, unpredictable, insufficient) |
| frail(adjective, able, prone) |
| careless(adjective, able, prone) |
| errant(adjective, wrong, able, prone, deviant) |
| error-prone(adjective, unreliable, insecure, treacherous, incalculable) |
| inaccurate(adjective, false, inadequate, unpredictable, insufficient) |
| fickle(adjective, unpredictable, unreliable, variable, insecure) |
| mortal(adjective, able, prone, hominid, humanoid) |
| undependable(adjective, unpredictable, unreliable, fickle, variable) |
| unsound(adjective, false, inadequate, reasoning, unpredictable) |
| debatable(adjective, uncertainty) |
| disputable(adjective, uncertainty) |
| errable(adjective, able, prone) |