insane (adj.)
- abnormal
- absurd
- apish
- asinine
- batty
- beguiled
- besotted
- bonkers
- brainless
- brainsick
- buffoonish
- buggy
- certifiable
- cockeyed
- crackbrained
- cracked
- crackers
- cranky
- crazed
- crazy
- credulous
- daft
- dazed
- delirious
- demented
- deranged
- disordered
- disoriented
- distraught
- dizzy
- doting
- dotty
- dull
- dumb
- eccentric
- fanatical
- fatuous
- febrile
- feverish
- flaky
- flighty
- fond
- foolish
- frantic
- frenetic
- frenzied
- fruity
- fuddled
- furious
- futile
- gaga
- goofy
- hectic
- hysteric
- idiotic
- imbecile
- imbecilic
- inane
- inept
- infatuated
- irrational
- irresponsible
- kinky
- kooky
- loco
- loony
- loopy
- ludicrous
- lunatic
- mad
- maddened
- maniac
- maniacal
- manic
- maudlin
- mazed
- mental
- mindless
- moronic
- neurotic
- nonsensical
- nuts
- nutty
- odd
- off
- overanxious
- overeager
- overenthusiastic
- overzealous
- perfervid
- potty
- psychoneurotic
- psychotic
- queer
- quirky
- reasonless
- reckless
- ridiculous
- sappy
- scatterbrained
- schizoid
- schizophrenic
- screwy
- senseless
- sentimental
- sick
- silly
- spacy
- strange
- stupid
- thoughtless
- touched
- unbalanced
- unhinged
- unrealistic
- unsettled
- unsound
- wacky
- wandering
- wet
- wild
- witless
The insane root
That takes the reason prisoner.
