| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | fickle, irresponsible |
| Synonyms: | airheaded, birdbrained, bubbleheaded, capricious, changeable, dingbat, dingdong, dizzy*, effervescent, empty-headed, featherbrained, frivolous, gaga, giddy, harebrained, impetuous, impulsive, inconstant, lightheaded, lively, mercurial, scatterbrained, silly, thoughtless, twit, unbalanced, unstable, unsteady, volatile, whimsical, wild |
| Antonyms: | responsible |
| Main Entry: | mercurial |
| Part of Speech: | adjective |
| Definition: | flighty, temperamental |
| Synonyms: | blowing hot and cold, bubbleheaded, buoyant, capricious, changeable, effervescent, elastic, erratic, expansive, fickle, flaky, flip*, fluctuating, gaga, gay, impulsive, inconstant, irregular, irrepressible, lighthearted, lively, lubricious, mad, mobile, movable, quicksilver, resilient, short-fuse, spirited, sprightly, ticklish, unpredictable, unstable, up-and-down, variable, volatile, yo-yo |
| Antonyms: | calm, tranquil, unchangeable, unperturbable, unvarying |
| Main Entry: | gaga |
| Part of Speech: | adjective |
| Definition: | giddy |
| Synonyms: | bemused, brainless, bubbleheaded, capricious, careless, changeable, changeful, ditzy, dizzy, empty-headed, erratic, featherbrained, fickle, flighty, flustered, frivolous, frothy, harebrained, heedless, inconstant, irresolute, irresponsible, lightheade |