17 entries under unsound topic. ×

12
impractical(adjective, unreasonable, unrealistic)
4
unattainable(adjective, reasonable, unreasonable)
4
unworkable(adjective, unreasonable)
3
worthless(adjective, unreasonable)
2
impossible(adjective, reasonable, sensible, unreasonable)
2
irrational(adjective, unreasonable)
2
incapable(adjective, unreasonable)
2
inefficient(adjective, unreasonable)
2
inexperienced(adjective, unreasonable)
2
unfeasible(adjective, unreasonable)
2
unreasonable(adjective, correct, right)
2
unserviceable(adjective, unreasonable)
1
unlikely(adjective, unreasonable)
1
unproficient(adjective, unreasonable)
1
unseasoned(adjective, unreasonable)
1
unskilled(adjective, unreasonable)
1
untrained(adjective, unreasonable)
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APASmart Define. (2016). practical thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/practical/thesaurus/antonyms
ChicagoSmart Define. 2016. "practical thesaurus" https://smartdefine.org/practical/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, practical thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/practical/thesaurus/antonyms>.
MLASmart Define. "practical thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/practical/thesaurus/antonyms>