n. 25B6; noun
his prowess as a winemaker : SKILL, expertise, mastery, facility, ability, capability, capacity, savoir faire, talent, genius, adeptness, aptitude, dexterity, deftness, competence, accomplishment, proficiency, finesse; informal know-how.
the knights' prowess in battle : COURAGE, bravery, gallantry, valour, heroism, intrepidity, nerve, pluck, pluckiness, boldness, daring, audacity, fearlessness; informal bottle, guts, spunk; N. Amer. informal moxie, sand.
inability, ineptitude, cowardice.