Englishhardihood
noun
dated
the soldiers showed great hardihood and endurance:
bravery, courage, boldness, daring, spirit, valour, mettle, heart, nerve, spine, pluck, dauntlessness, doughtiness, fortitude, courageousness, backbone, intrepidity, intrepidness, heroism, strength of character, moral fibre;
informal guts, grit, spunk;
British, informal bottle;
North American, informal moxie, cojones, sand;
vulgar slang balls.
▷antonyms timidity.
hardihood Oxford Dictionary of English