| boutade(noun, impulsive, absurdity, thoughts, caprice) |
| megrim(noun, impulsive, whim, irregularity, thoughts) |
| bee(noun, character, fancy, strain, mind) |
| capriccio(noun, caprice) |
| fickleness(noun, fancy, humor, impulse, quirk) |
| flimflam |
| idea(noun, desire, fancy, urge, impression) |
| aberration(noun, chance, coincidence, fluke) |
| crank |
| craze(noun, art, craft, passion, fancy) |
| fool notion(noun, expression, passion, fancy, fashion) |
| gambol(trick, fun, amusement, humor, gag) |
| idiosyncrasy(noun, chance, coincidence, fluke) |
| lark(noun, trick, fun, amusement, humor) |
| peculiarity(noun, fancy, twist, humor, chance) |
| rage(noun, passion, fancy, thing, fashion) |
| antic(trick, fun, amusement, humor, gag) |
| arbitrariness(noun, caprice) |
| brainstorm(noun, concept, idea, stimulus) |
| catalyst(noun, feeling, drive, passion, desire) |