flightiness

1 a lack of seriousness often at an improper time <a warning that her usual flightiness wouldn't be tolerated at the ceremony honoring war veterans> Synonyms facetiousness, frivolity, flippancy, frivolousness, frothiness, levity, light-headedness, light-mindedness, lightness, sillinessRelated Words cheer, cheerfulness, festivity, gaiety (also gayety), glee, gleefulness, high-spiritedness, hilarity, joviality, lightheartedness, merriment, mirth, mirthfulness; childishness, goofiness, puerilityNear Antonyms dejection, depression, despondency, dispiritedness, downheartedness, gloom, gloominess, heartsickness, joylessness, melancholy, mopes, moroseness, sadness, sullenness, unhappinessAntonyms earnestness, gravity, seriousness, soberness, solemnity, solemnness

2 a state of nervousness marked by sudden jerky movements <his flightiness before the bar exam was so bad that he nearly made himself sick> Synonyms edginess, fidgetiness, fidgets, jumpiness, jitteriness, restiveness, skittishnessRelated Words agita, agitation, anxiety, anxiousness, apprehension, apprehensiveness, disquiet, feverishness, franticness, freneticism, hand-wringing, perturbation, restlessness, trepidation, unease, uneasiness, upset, worry; nerves, tenseness, tension; butterflies, dither, heebie-jeebies, jimjams, jitters, shakes, shivers, williesNear Antonyms confidence, self-assurance, self-confidence, sureness; control, self-control; aplomb, calm, calmness, collectedness, composure, coolness, ease, easiness, equanimity, equilibrium, imperturbability, poise, repose, self-possession, tranquillity (or tranquility), tranquilness