Same word as valor:

backbone, boldness, courage, dash, defiance, derring-do, determination, fearlessness, fight, firmness, fortitude, gallantry, grit, guts, hardihood, heart, heroism, indomitableness, intestinal fortitude, intrepidity, invincibility, mettle, moxie, nerve, pluck, prowess, resolution, sand, spirit, spunk, starch, stomach, tenacity, valiance, valiancy