| groundless(adjective, reason, foolish, true, crazy) |
| unsound(adjective, wrong, fake, false, counterfeit) |
| baseless(adjective, false, foolish, true, crazy) |
| unwarranted(adjective, right, reasonable, true, untrue) |
| fallacious(adjective, wrong, fake, false, counterfeit) |
| unjustifiable(adjective, unwarranted, defended, verbal attack) |
| idle(adjective, false, true, hollow, unwarranted) |
| invalid(adjective, wrong, fake, false, counterfeit) |
| unjustified(adjective, unwarranted, untrue, flimsy, wanton) |
| untenable(adjective, false, defended, verbal attack) |
| faulty(adjective, wrong, fake, false, counterfeit) |
| false(adjective, wrong, fake, counterfeit, unreasonable) |
| gratuitous(adjective, unwarranted, untrue, flimsy, necessary) |
| illogical(adjective, wrong, false, unreasonable, incorrect) |
| unreasonable(adjective, foolish, irrational, unwarranted, illogical) |
| unsustainable(adjective, defended, verbal attack) |
| untrue(adjective, wrong, fake, false, counterfeit) |
| indefensible(adjective, senseless, unwarranted, wanton, gratuitous) |
| specious(adjective, wrong, fake, false, counterfeit) |
| unsubstantiated |