70 entries under impractical topic. ×

20
imbecilic(adjective, weak, simple, knowledge, ability)
20
unreasonable(adjective, characteristic, weak, simple, wrong)
20
meaningless(adjective, characteristic, slight, foolish, stupid)
19
moronic(adjective, weak, simple, knowledge, ability)
18
unwise(adjective, characteristic, weak, simple, wrong)
17
simple(noun, adjective, characteristic, weak, slight)
16
imprudent(adjective, characteristic, weak, simple, careless)
16
harebrained(adjective, characteristic, weak, simple, knowledge)
16
illogical(adjective, characteristic, wrong, foolish, stupid)
14
ignorant(adjective, characteristic, slight, detail, foolish)
14
nitwitted(adjective, characteristic, foolish, stupid, senseless)
14
unintelligent(adjective, characteristic, weak, simple, slight)
13
balmy(adjective, characteristic, knowledge, slang, ability)
13
inconsistent(adjective, characteristic, wrong, foolish, stupid)
12
loony(adjective, light, weak, simple, wrong)
12
wild(adjective, wrong, strange, foolish, stupid)
11
dumb(adjective, foolish, stupid, crazy, vague)
9
batty(adjective, light, wild, foolish, stupid)
5
feeble-minded(adjective, foolish, stupid, vague, impulsive)
4
crackpot(adjective, half-baked, doomed)
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APASmart Define. (2016). silly thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/silly/thesaurus/synonyms
ChicagoSmart Define. 2016. "silly thesaurus" https://smartdefine.org/silly/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, silly thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/silly/thesaurus/synonyms>.
MLASmart Define. "silly thesaurus" 20 January 2016. Web. 21 September 2026. <https://smartdefine.org/silly/thesaurus/synonyms>