Synonyms of the word 
VIVACIOUS → SPIRITED - VIBRANT
vivacious
- adj. Lively and animated; full of life and energy.
- adj. (obsolete) Long-lived.
- adj. (rare) Difficult to kill.
spirited
- v. simple past tense and past participle of spirit.
- adj. Lively, vigorous, animated or courageous.
vibrant
- adj. Pulsing with energy or activity.
- adj. Lively and vigorous.
- adj. Vibrating, resonant or resounding.
- adj. (of a colour) Bright.
If you are interested in words, visit the following sites :
- wiktionary.org/vivacious For complete definition of a word
- 1word.ws/vivacious to play with words, suffixs, prefixs, etc.