| unsubstantiated |
| bottomless(adjective, reason, false, true, senseless) |
| chimerical(adjective, reason, justification) |
| heedless |
| illusory(adjective, reason, justification) |
| imaginary(adjective, reason, justification) |
| uncalled-for(adjective, reason, false, useless, senseless) |
| absurd(adjective, foolish, unreasonable, irrational, illogical) |
| insupportable(adjective, defended, verbal attack) |
| invalid(foolish, unreasonable, reasoning, irrational, illogical) |
| irrational(adjective, foolish, unreasonable, illogical, defended) |
| ridiculous(adjective, foolish, unreasonable, illogical, defended) |
| sophistic(adjective, foolish, unreasonable, irrational, illogical) |
| specious(adjective, foolish, unreasonable, irrational, illogical) |
| speculative |
| vain(adjective, false, empty, worthless, untrue) |
| apocryphal(adjective, error) |
| causeless(adjective, reason, useless, senseless, unwarranted) |
| dead |
| erroneous(adjective, error) |