Synonyms of buoyant in English:

buoyant


See US English definition of buoyant

See UK English definition of buoyant

See Spanish definition of flotante

adjective

1‘a buoyant substance’

SYNONYMS
able to float, light, floating
rare floatable
ANTONYMS

heavy

2‘they dispersed in a buoyant mood’

SYNONYMS
cheerful, cheery, happy, light-hearted, carefree, bright, glad, merry, joyful, bubbly, bouncy, effervescent, blithe, sunny, breezy, jolly, jovial, animated, lively, sprightly, jaunty, ebullient, high-spirited, vivacious, vital, sparkling, sparky, zestful, perky
optimistic, confident, hopeful, sanguine, bullish, positive
informal peppy, zippy, zingy, upbeat
dated gay
ANTONYMS

depressed, pessimistic

3‘car sales were buoyant’

SYNONYMS
booming, strong, vigorous, burgeoning, thriving, growing, developing, progressing, improving, expanding, mushrooming, snowballing, ballooning
informal going strong
ANTONYMS

depressed