fanciful (adj.)
- absurd
- airy
- antic
- apocryphal
- arbitrary
- baroque
- bizarre
- capricious
- changeable
- chimerical
- conceptual
- cranky
- crotchety
- curious
- dreamlike
- ethereal
- extravagant
- fabulous
- false
- fancied
- fantastic
- fatuous
- fickle
- fictional
- fictitious
- fictive
- flaky
- florid
- freakish
- gaseous
- grotesque
- harebrained
- ideal
- ideational
- ideological
- illusory
- imaginary
- imaginative
- imagined
- immaterial
- impossible
- impulsive
- incomprehensible
- inconceivable
- inconstant
- incredible
- kinky
- legendary
- maggoty
- make-believe
- moody
- motiveless
- mythical
- notional
- odd
- original
- outlandish
- peculiar
- petulant
- preposterous
- quirky
- rarefied
- rococo
- shadowy
- spirituous
- subtle
- supposititious
- temperamental
- tenuous
- theoretical
- unaccountable
- unbelievable
- unexpected
- unimaginable
- unreal
- unrealistic
- unreasonable
- unrestrained
- unsubstantial
- unusual
- vagrant
- vaporous
- variable
- visionary
- wanton
- wayward
- whimsical
- wild
- windy
- wrong
