175 entries under foolish topic. ×

1
trivial(adjective, dull, simple, value, silly)
1
unbalanced(adjective, wild, silly, crazy)
1
unbelievable(adjective, strange, stupid, crazy)
1
unsound(adjective, wrong, silly, stupid)
1
unworkable(silly, fantastic, impractical, unreal)
1
vacant(adjective, wrong, value, stupid)
0
all wet(expression, stupid, senseless, irrational)
0
ape(silly, unwise)
0
arbitrary(stupid, senseless, irrational, perverse)
0
bananas(crazy, mad, fantastic, crazed)
0
baseless(unreasonable, illogical)
0
bats in the belfry(expression, idiom, silly, unwise)
0
berserk(silly, unwise)
0
beyond reason(expression, fantastic, unrealistic)
0
biased(adjective, wrong, stupid, senseless)
0
birdbrained(impractical, unintelligent, half-baked, doomed)
0
cracked(silly, crazy, mad, unwise)
0
dense(dull, stupid, unintelligent, dumb)
0
deranged(silly, crazy, mad, unwise)
0
dingy(silly, unwise)
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APASmart Define. (2015). nonsensical thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/nonsensical/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonsensical thesaurus" https://smartdefine.org/nonsensical/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, nonsensical thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/nonsensical/thesaurus/synonyms>.
MLASmart Define. "nonsensical thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/nonsensical/thesaurus/synonyms>