toughness Definition

stamina, ruggedness, formidability, temper, huskiness, staying power, tenacity, fortitude, resiliency, strength, perseverance, resilience, intensity, determination, hardness, persistence, rigor, firmness, steadfastness, thoroughness, endurance, roughness, devotion, robustness, rigidity, harshness, brutality, inflexibility, strictness, rudeness, severity, stringency, rigour, sinew, cruelty, hardline, steel, radicalism, hardship, resistance, hardening, extremism, firm, résistance, athleticism, fearlessness, aggressiveness, explosiveness, physicality, quickness, relentlessness, finesse, unselfishness, decisiveness, steeliness, durability, doggedness, steadiness, courage, versatility, fierceness, ruthlessness, mettle, ferocity, sturdiness, prowess, stubbornness, boldness, composure, resoluteness, charisma, tenaciousness, feistiness, scrappiness, work ethic, grit, moxie, physicalness, smarts, poise, grittiness, spunk, cockiness, ferociousness, shiftiness, stoutness, swagger, combativeness, unflappability, consistency, hustle, brashness, gameness, bravado, youngness, gutsiness, inexperience, craftiness, athletism, pugnaciousness,