| idealistic | |
| impracticable | |
| irrational(adjective, unreasonable, unsound) | |
| baneful | |
| in mind | |
| incapable(adjective, unreasonable, unsound) | |
| ineffective(adjective, weak) | |
| inefficient(adjective, unreasonable, unsound) | |
| inexperienced(adjective, unreasonable, unsound) | |
| not helpful | |
| screwball | |
| unfeasible(adjective, unreasonable, unsound) | |
| unpractical(adjective, impractical) | |
| unreasonable(adjective, correct, right, unsound) | |
| unserviceable(adjective, unreasonable, unsound) | |
| unwieldy | |
| abstract | |
| academic(adjective, philosophy) | |
| foolish(adjective, sound, wise) | |
| awkward |
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| APA | Smart Define. (2016). practical thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/practical/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "practical thesaurus" https://smartdefine.org/practical/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, practical thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/practical/thesaurus/antonyms>. |
| MLA | Smart Define. "practical thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/practical/thesaurus/antonyms> |