Synonyms for High-spirited:

adj.

active (adjective)
lively.
brave (adjective)
valiant.
courageous (adjective)
brave.
enthusiastic (adjective)
fiery, pert, peppery, exuberant, lively, vivacious, ebullient.
lively (adjective)
bouncy.

n.

dynamic, active, vital, alive, energetic, vigorous. chipper, vivacious, animated, bouncy, peppy, action, pert, dashing, lively. mettlesome, feelings, vibrant, fiery, peppery, snappy. daring (noun)
dauntless, brave, valiant, reckless.
high-spirited (noun)
exuberant, spirited, ebullient.

Other synonyms:

bouncy, valiant. pert, active, vivacious, chipper, snappy, vibrant. fiery, dashing, peppy, mettlesome. peppery. animated. spirited
lively, spirited.
Other relevant words:
dashing, vivacious, lively, active, snappy, vibrant, action, reckless, energetic, feelings, dauntless, brave, peppy, chipper, alive, fiery, bouncy, vigorous, pert, animated, vital, valiant, peppery, dynamic, mettlesome.