1. (n.) A whim; a freak; a capricious notion, a fanciful or odd conceit.

2. (n.) A whim.

3. (n.) A whimsy.

aberration abnormality anomaly apparition boutade brainchild brainstorm bubble capriccio caprice chimera conceit crackpotism crank crankiness crankism craze crazy idea crotchet crotchetiness delirium deviancy deviation differentness disposition divergence dottiness dream eccentricity eidolon erraticism erraticness fad fancy fantasque fantastic notion fantasy fiction figment flimflam fool notion freak freakiness freakish inspiration freakishness hallucination harebrained idea humor idea idiocrasy idiosyncrasy idle fancy illusion imagery imagination imagining inclination insubstantial image invention irregularity kink maggot make-believe mannerism megrim myth nonconformity notion oddity passing fancy peculiarity phantasm phantom queerness quip quirk quirkiness romance sick fancy singularity strangeness thick-coming fancies thought toy trick trip twist unconventionality unnaturalness vagary vapor vision whim whim-wham whimsicality wildest dreams