| void(noun, adjective, negative, inferior, inadequate) |
| ineffective(adjective, inferior, inadequate, useless, unsound) |
| zero(noun, adjective, slight, lower, informal) |
| bad(adjective, false, unreasonable, unsound, unacceptable) |
| naught(noun, zero, nonexistence) |
| cipher(noun, zero, nonexistence) |
| invalid(adjective, void, unsound, worthless, unacceptable) |
| null and void(expression, adjective, idiom, negative, inferior) |
| useless(adjective, weak, slight, lower, value) |
| barren(adjective, inadequate, limited, feeble, useless) |
| nothing(noun, adjective, slight, lower, value) |
| nil(noun, absence, nonexistence) |
| nix(noun, slang, absence, zero) |
| vain(adjective, inferior, inadequate, limited, feeble) |
| worthless(adjective, slight, lower, value, inferior) |
| zilch(noun, adjective, slight, lower, slang) |
| empty(adjective, unsubstantial, nonexistent, unsubstantiality) |
| aught(noun, absence, archaism) |
| cypher |
| ineffectual(adjective, inferior, inadequate, limited, feeble) |