foolish (adj.)
- absurd
- airy
- apish
- arch
- asinine
- batty
- beguiled
- bemused
- besotted
- bizarre
- blockheaded
- boneheaded
- brainless
- brash
- buffoonish
- catchpenny
- cockamamie
- cockeyed
- confused
- crazy
- credulous
- daft
- dazed
- demented
- devilish
- dim
- dim-witted
- dizzy
- dopey
- doting
- dotty
- dumb
- elfish
- elvish
- empty
- empty-headed
- erratic
- extravagant
- fantastic
- fatuous
- feebleminded
- flaky
- flimsy
- fond
- foolhardy
- frivolous
- frothy
- fuddled
- futile
- gaga
- goofy
- grotesque
- hasty
- headless
- headlong
- heedless
- high-flown
- high-spirited
- idiotic
- idle
- ignorant
- ill-advised
- ill-considered
- illogical
- imbecile
- imbecilic
- impetuous
- impish
- impolitic
- imprudent
- inane
- incautious
- incredible
- indiscreet
- inept
- infatuated
- injudicious
- insane
- insensate
- irrational
- knavish
- kooky
- laughable
- light
- light-headed
- loony
- ludicrous
- mad
- maudlin
- mindless
- mischievous
- misguided
- monstrous
- moronic
- nonsensical
- nugatory
- nuts
- nutty
- obtuse
- otiose
- outrageous
- outre
- playful
- potty
- prankish
- preposterous
- puckish
- rash
- reasonless
- reckless
- ridiculous
- roguish
- rubbishy
- sappy
- scatterbrained
- screwy
- senseless
- sentimental
- shallow
- silly
- slender
- slight
- slow-witted
- sportive
- stolid
- stupid
- superficial
- thick
- thickheaded
- thoughtless
- trashy
- tricksy
- trifling
- trite
- trivial
- unintelligent
- unorthodox
- unreasonable
- unreasoning
- unstable
- untalented
- unthinking
- unwary
- unwise
- vacuous
- vain
- vapid
- wacky
- waggish
- weird
- wet
- wild
- windy
- witless
How now, foolish rheum!
Here lies our sovereign lord the king,
Whose word no man relies on;
He never says a foolish thing,
Nor ever does a wise one.
God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things that are mighty.
Charm'd with the foolish whistling of a name.
