— absurd
— asinine
— cockamamie
— cockamamy
— cockeyed
— debate
— debit
— debt
— debut
— defeat
— deft
— depot
— depth
— depute
— deputy
— derisory
— deviate
— devoid
— devote
— devotee
— devout
— divide
— doubt
— dubiety
— duped
— fatuous
— fond
— goofy
— harebrained
— idiotic
— ill-advised
— ill-conceived
— impolitic
— imprudent
— inadvisable
— inane
— insane
— laughable
— ludicrous
— mad
— mindless
— misbegotten
— misguided
— nonsensical
— preposterous
— rattlebrained
— rattlepated
— ridic
— ridiculous
— sappy
— scatterbrained
— scatty
— silly
— unadvisable
— unadvised
— unwise
— vacuous
— wacky
— whacky
— zany