Synonyms of effervescent

1 Syllable
yoyo, brash
2 Syllables
foamier, airy, cheerful, dingdong, brasher, frothy, weightless, boiling, bubblier, frothing, bouncier, gassy, sudsy, spumy, spumous, flighty, bubbly, flightier, brashest, gaseous, yo-yo, joyful, bouncy, gogo, flightiest, mantling, go-go, sparkling, yeasty, foamy, bubbling
3 Syllables
mercurial, rubbery, lathery, liveliest, capricious, light-footed, coruscant, floatable, ebullient, lightsome, featherweight, spumante, vivacious, lightfooted, quicksilver, spirited, aeriform, resilient, lively, lighthearted, livelier, vagarious, elastic, boisterous, light-hearted, fermenting
4 Syllables
volatile, gossamery, high-spirited, exuberant, carbonated, self-asserting, bubbleheaded, humorsome, expansive