Synonyms for Vivacious:

adj.

active (adjective)
eager, stirring, spirited, energetic, enterprising, dynamic, active, assiduous, busy, industrious, sprightly, lively, animated, tireless, bustling, sedulous, moving.
energetic (adjective)
spirited, vigorous, forceful, potent, powerful, strong, fervid, snappy, energetic, zealous, mighty, driven, effervescent, ardent, active, spunky, mettlesome, zippy, puissant, peppy.
enthusiastic (adjective)
high-spirited.
lively (adjective)
animated, bouncy.
lively, spirited (adjective)
active, vibrant, sprightly, high-spirited, full of life, happy, effervescent, bouncy, animated.
perky (adjective)
bright-eyed and bushy-tailed.
sociable (adjective)
cordial, affable, chatty, convivial, gracious, gabby, folksy, courteous, friendly, hearty, hospitable, amiable, amicable, talkative, congenial, easygoing, sociable, companionable, genial, gregarious, neighborly, garrulous.

n.

pert, full of life, bright-eyed and bushy-tailed, bouncy, high-spirited, dashing, chipper, action. spirited (noun)
happy, bubbly, study at lively.
vivacious (noun)
spirited, vibrant.

Other synonyms:

bouncy, happy. high-spirited, chipper, pert. dashing. Other relevant words:
dashing, chipper, bubbly, pert, bouncy, vibrant, bright-eyed and bushy-tailed, happy, high-spirited, full of life.

Usage examples for vivacious

  1. He looked serious- minded, almost somber, and Leslie, though prepared to be vivacious with peer or pauper, found it all duty and little fun to make conversation with him until the next arrival should come to her relief. – Aurora the Magnificent by Gertrude Hall
  2. Vivacious eyes that hinted at a stunning amber brown sparkled beneath masses of the most wonderful auburn hair. – The Exploits of Elaine by Arthur B. Reeve
  3. General T is so upset, she explained in her vivacious way, that I had to come instead. – Greener Than You Think by Ward Moore