| humor(noun, amusement, joke, satire, wittiness) |
| unpredictability(noun, flightiness, randomness) |
| waywardness(noun, irregularity, peculiarity, aberration, abnormality) |
| whim |
| indecisiveness(noun, motivelessness) |
| aberration(noun, irregularity, peculiarity, nonconformity, abnormality) |
| abnormality(noun, irregularity, peculiarity, nonconformity, aberration) |
| anomaly(noun, irregularity, peculiarity, aberration, abnormality) |
| facetiousness(noun, trick, sport, humor, wit) |
| game(noun, amusement, merriment, triviality, levity) |
| idiosyncrasy(noun, originality, eccentricity, peculiarity, nonconformity) |
| inconstancy(noun, frivolity, lightness, unpredictability, flightiness) |
| instability(noun, frivolity, lightness, unpredictability, flightiness) |
| levity(noun, play, sport, amusement, wit) |
| merriment(noun, amusement, playfulness, perkiness) |
| naughtiness |
| nonconformity(noun, irregularity, peculiarity, aberration, abnormality) |
| oddness(noun, irregularity, peculiarity, aberration, abnormality) |
| peculiarity(noun, originality, eccentricity, nonconformity, unusualness) |
| play(noun, amusement, merriment, triviality, levity) |