Synonyms|1.2kAntonyms|229|Broader|47Narrower|81Related|1.9k

281 entries under foolish topic. ×

2
innocent(simple, fool, naive, jerk)
2
mad as a March hare(expression, idiom, mad, insane)
2
mad as a hatter(expression, idiom, mad, insane)
2
moonstruck(adjective, soft, tender, sweet, wild)
2
neglectful(adjective, careless, stupid, senseless)
2
negligent(adjective, senseless, insensitive, unnecessary)
2
nutty as fruitcake(expression, idiom, mad, insane)
2
obtuse(adjective, careless, stupid, senseless)
2
odd(adjective, wild, strange, stupid)
2
of unsound mind(expression, idiom, stupid, mad)
2
out to lunch(expression, idiom, crazy, mad)
2
raving(stupid, unreasonable, illogical)
2
round the bend(expression, idiom, mad, insane)
2
slow(adjective, stupid, vague, impulsive)
2
spaced-out(adjective, senseless, unnecessary, pointless)
2
strange(fantastic, ridiculous, unwise, impractical)
2
thick-headed
2
trustful(innocent, susceptible, naive, trusting)
2
unbalanced(adjective, simple, wild, mad)
2
unstable(unreasonable, unreliable, changeable, erratic)
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ChicagoSmart Define. 2016. "silly thesaurus" https://smartdefine.org/silly/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, silly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/silly/thesaurus/synonyms>.
MLASmart Define. "silly thesaurus" 20 January 2016. Web. 23 September 2026. <https://smartdefine.org/silly/thesaurus/synonyms>