The Oxford Thesaurus An A-Z Dictionary of Synonyms - whimsical adj.

1) quaint, fey, fanciful, odd, curious, unusual, chimeric(al) , queer, singular, peculiar, funny, fantastic(al) , pixyish, playful, puckish, absurd, preposterous, Colloq offbeat: When Andrew's whimsical drawings caught on they were bought by greetings card makers. 2) capricious, erratic, eccentric, wavering, flighty, unsettled, fickle, mercurial, wavering, fluctuating, unpredictable, inconsistent, volatile, unsteady: The buses in our village run on what could best be termed a whimsical timetable.