whimsical (adj.)
- abnormal
- absurd
- adrift
- afloat
- agnostic
- alternating
- ambiguous
- amorphous
- amusing
- anomalous
- arbitrary
- baroque
- biting
- bizarre
- brilliant
- capricious
- chancy
- changeable
- changeful
- clever
- crank
- cranky
- crotchety
- desultory
- deviant
- dicey
- different
- divergent
- dizzy
- dotty
- doubting
- droll
- eccentric
- equivocal
- erratic
- exceptional
- extravagant
- facetious
- fanciful
- fantastic
- fey
- fickle
- fitful
- flaky
- flickering
- flighty
- florid
- fluctuating
- freakish
- funny
- giddy
- grotesque
- harebrained
- hesitant
- hesitating
- hilarious
- humorous
- idiosyncratic
- iffy
- impetuous
- impulsive
- incalculable
- incongruous
- inconsistent
- inconstant
- indecisive
- infirm
- irregular
- irresolute
- irresponsible
- jesting
- jocose
- jocular
- joking
- keen
- kinky
- kooky
- laughable
- ludicrous
- maggoty
- mazy
- mercurial
- moody
- mordant
- motiveless
- notional
- nutty
- odd
- outlandish
- peculiar
- petulant
- pointed
- polysemous
- preposterous
- priceless
- pungent
- quaint
- queer
- quick-witted
- quirky
- quizzical
- rambling
- restless
- rich
- ridiculous
- risible
- rococo
- roving
- salt
- salty
- scatterbrained
- scintillating
- screaming
- screwball
- screwy
- shapeless
- sharp
- shifting
- shifty
- singular
- skeptical
- smart
- sparkling
- spasmodic
- spineless
- sprightly
- strange
- temperamental
- touch-and-go
- twisted
- unaccountable
- uncertain
- uncontrolled
- unconventional
- unconvinced
- undependable
- undisciplined
- unfixed
- unforeseeable
- unnatural
- unpersuaded
- unpredictable
- unprovable
- unreasonable
- unreliable
- unrestrained
- unsettled
- unstable
- unsteady
- unsure
- unverifiable
- vacillating
- vagrant
- variable
- volatile
- wacky
- wandering
- wanton
- wavering
- wavy
- wayward
- wild
- wishy-washy
- witty