Synonyms of whimsy

1. notion, whim, whimsy, whimsey, idea, thought: usage: an odd or fanciful or capricious idea; "the theatrical notion of disguise is associated with disaster in his stories"; "he had a whimsy about flying to the moon"; "whimsy can be humorous to someone with time to enjoy it"
2. flightiness, arbitrariness, whimsicality, whimsy, whimsey, capriciousness, irresponsibility, irresponsibleness: usage: the trait of acting unpredictably and more from whim or caprice than from reason or judgment; "I despair at the flightiness and whimsicality of my memory"