prove oneself(v = verb.cognition) - show one's ability or courage;
is one way to demonstrate, establish, prove, shew, show
Sample sentences: Somebody ----s

assert oneself, band oneself, bestir oneself, betake oneself, brace oneself for, bring oneself, cross oneself, declare oneself, extend oneself, find oneself, help oneself, inconvenience oneself, keep to oneself, kill oneself, lend oneself, lower oneself, oneself, overexert oneself, pride oneself, prove, relieve oneself, remember oneself, steel oneself against, trouble oneself