| abstract(wild, unreasonable, useless, absurd, unrealistic) |
| absurd(wild, unreasonable, useless, unrealistic, unattainable) |
| amateurish |
| chimerical(wild, unreasonable, useless, absurd, abstract) |
| idealistic(wild, unreasonable, useless, absurd, abstract) |
| illogical(wild, unreasonable, useless, absurd, abstract) |
| impossible(wild, unreasonable, useless, absurd, abstract) |
| impracticable(wild, unreasonable, useless, absurd, unrealistic) |
| impractical(adjective, unreasonable, unrealistic, unpractical, unviable) |
| improbable(wild, unreasonable, useless, absurd, abstract) |
| inapplicable(wild, unreasonable, useless, absurd, abstract) |
| inefficacious(wild, unreasonable, useless, absurd, abstract) |
| infeasible(wild, unreasonable, useless, absurd, unrealistic) |
| inoperable(wild, unreasonable, useless, absurd, abstract) |
| ivory-tower(wild, unreasonable, useless, absurd, abstract) |
| nonfunctional(wild, unreasonable, useless, absurd, abstract) |
| nonviable(wild, unreasonable, useless, absurd, abstract) |
| otherworldly(wild, unreasonable, useless, absurd, abstract) |
| quixotic(wild, unreasonable, useless, absurd, abstract) |
| romantic(wild, unreasonable, useless, absurd, abstract) |