bubbleheaded

capricious giddy unstable

airheaded birdbrained changeable dingbat dingdong dizzy effervescent empty-headed featherbrained frivolous gaga harebrained impetuous impulsive inconstant lightheaded lively mercurial scatterbrained silly thoughtless twit unbalanced unsteady volatile whimsical wild

sensible steady

responsible

bemused brainless capricious careless changeable changeful ditzy dizzy empty-headed erratic featherbrained fickle flighty flustered frivolous frothy harebrained heedless inconstant irresolute irresponsible lightheade

bemused dizzy gaga skittish woozy

brainless capricious careless changeable changeful ditzy empty-headed erratic fickle flighty flustered frivolous heedless inconstant irresolute irresponsible lightheaded punchy reckless reeling scatterbrained slaphappy swimming thoughtless unbalanced unsettled unstable unsteady vacillating volatile whimsical whirling wild

calm careful level-headed sensible serious

changeable effervescent erratic impulsive resilient unpredictable volatile

blowing hot and cold buoyant capricious elastic expansive fickle flaky flip fluctuating gaga gay inconstant irregular irrepressible lighthearted lively lubricious mad mobile movable quicksilver spirited sprightly ticklish unstable up-and-down variable yo-yo

certain constant predictable reliable stable steady sure unchanging

calm tranquil unchangeable unperturbable unvarying