silly (n.)
silly (adj.)
- absurd
- airy
- apish
- asinine
- balmy
- batty
- beguiled
- benumbed
- besotted
- brainless
- buffoonish
- catchpenny
- childish
- cockeyed
- crazy
- credulous
- daft
- dazed
- dazzled
- dizzy
- dopey
- doting
- dumb
- dummy
- empty
- empty-headed
- fatuous
- featherbrained
- flaky
- flighty
- flimsy
- fond
- foolhardy
- foolish
- frivolous
- frothy
- fuddled
- futile
- gaga
- giddy
- goofy
- groggy
- harebrained
- idiotic
- idle
- ignorant
- illogical
- imbecile
- imbecilic
- inane
- inept
- infatuated
- insane
- irrational
- irresponsible
- kooky
- laughable
- light
- light-headed
- loony
- ludicrous
- mad
- maudlin
- mazed
- moronic
- muzzy
- nitwitted
- nonsensical
- nugatory
- nutty
- off
- otiose
- pointless
- preposterous
- puerile
- punch-drunk
- rattlebrained
- ridiculous
- risible
- rubbishy
- sappy
- scatterbrained
- screwy
- senseless
- sentimental
- shallow
- slaphappy
- slender
- slight
- stunned
- stupefied
- stupid
- superficial
- thoughtless
- trashy
- trifling
- trite
- trivial
- unintelligent
- unreasonable
- unwise
- vacuous
- vain
- vapid
- wacky
- wet
- windy
- witless
- woozy
