| useless(adjective, weak, failure, inferior, inadequate) |
| futile(adjective, inadequate, limited, feeble, useless) |
| unsuccessful(adjective, inferior, inadequate, limited, feeble) |
| vain(adjective, weak, idle, inadequate, limited) |
| fruitless(adjective, failure, stupid, idle, inadequate) |
| ineffectual(adjective, failure, stupid, inadequate, feeble) |
| ineffective(adjective, failure, stupid, idle, useless) |
| unavailing(adjective, weak, failure, stupid, idle) |
| bootless(adjective, failure, stupid, idle, inadequate) |
| unproductive(adjective, weak, stupid, inferior, idle) |
| barren(adjective, inferior, inadequate, limited, feeble) |
| worthless(adjective, weak, inferior, inadequate, limited) |
| idle(adjective, stupid, inadequate, limited, feeble) |
| failed(adjective, failing, vain, ineffective, unsuccessful) |
| pointless(adjective, stupid, useless, trivial, empty) |
| sterile(adjective, vain) |
| inefficacious(adjective, inferior, inadequate, useless, trivial) |
| unprofitable(adjective, weak, inferior, feeble, useless) |
| profitless(adjective, stupid, idle, useless, trivial) |
| stillborn(adjective, failure) |