| inefficacious(adjective, inferior, inadequate, feeble, useless) |
| nada |
| negative(adjective, ineffectual, valueless, nothing, nonexistent) |
| nonexistent(adjective, real, ineffectual, valueless, fictional) |
| nugatory(adjective, slight, lower, value, inferior) |
| vacant(adjective, unsubstantial, nonexistent, unsubstantiality) |
| vacuous(adjective, unsubstantial, nonexistent, unsubstantiality) |
| valueless(adjective, useless, worthless) |
| zip(noun, adjective, slight, lower, value) |
| absent(adjective, ineffectual, valueless, nothing, nonexistent) |
| goose egg(noun, expression, idiom, zero) |
| inoperative(adjective, inferior, inadequate, limited, feeble) |
| nought(noun, zero) |
| hollow |
| imaginary(adjective, unreal, ineffectual, valueless, nonexistent) |
| meaningless(adjective, slight, lower, value, inferior) |
| nonexistence(noun, adjective, nonexistence, unsubstantial) |
| blank |
| devoid(adjective, nonexistent) |
| dissolve(verb, abrogation, inexistence) |