Synonyms for Vaulting (same or very similar meaning)
WordNet sense 1 (a light leap by a horse in which both hind legs leave the ground before the forelegs come down):
curvetWordNet sense 2 (revealing excessive self-confidence; reaching for the heights):
overreachingWordNet sense 3 (fearless and daring):
boldFrom the ODE community, based on WordNetadd/edit