1) Antic 2) Arbitrary 3) Conceited 4) Droll 5) Fanciful 6) Fey 7) Freakish 8) Imaginary 9) Impulsive 10) Odd 1) Arbitrary 2) Capricious 3) Impulsive 4) Oddball 5) Playfully kooky 
[horse] Whimsical (foaled 1903 at Raceland Stud in Kentucky) was an American thoroughbred racehorse. She was sired by the Orlando, out of the mare, Kismet, who was sired by United States Racing Hall of Fame stallion, Hindoo. Whimsical is best known as the second filly to ever win the Preakness Stakes. As a two-year-old she finished second w...
• (a.) Full of, or characterized by, whims; actuated by a whim; having peculiar notions; queer; strange; freakish. • (a.) Odd or fantastic in appearance; quaintly devised; fantastic.
Whim'si·cal adjective [ From Whimsey .] 1. Full of, or characterized by, whims; actuated by a whim; having peculiar notions; queer; strange; freakish. 'A whimsical insult.' Macaulay. « My neighbors call me whimsical .» Addison. 2. Odd...
full of odd and fanciful ideas 
[SAT terms] determined by chance or impulse rather than by necessity indulging in or influenced by the imagination determined by chance or impulse rather than by necessity