Toughness

n.

1.

The quality or state of being tough.

Noun	1.	toughness - enduring strength and energy Synonyms: stamina, staying power
	2.	toughness - the property of being big and strong Synonyms: huskiness, ruggedness
	3.	toughness - the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking Synonyms: temper
	4.	toughness - impressive difficulty Synonyms: formidability

Spartanism, abstruseness, adamantness, adhesiveness, arduousness, astringency, austerity, authoritarianism, backbone, body, bothersomeness, bottom, bullheadedness, burdensomeness, callosity, callousness, chutzpah, clabbering, clamminess, clotting, coagulation, cohesiveness, colloidality, complexity, complication, concreteness, consistency, courage, curdling, decisiveness, demandingness, density, difficultness, difficulty, discipline, doughiness, dourness, durity, endurance, energy, exactingness, firmness, flintiness, gameness, gelatinity, gelatinousness, gluelikeness, gluiness, glutinosity, glutinousness, grimness, grit, gumlikeness, gumminess, guts, gutsiness, guttiness, hairiness, hard-bittenness, hard-nosedness, hardiness, hardness, hardness of heart, harshness, heart, heart of oak, heartiness, heaviness, immovability, immutability, impenetrability, implacability, impliability, incrassation, induration, inelasticity, inexorability, inflexibility, inspissation, intestinal fortitude, intransigeance, intransigence, intransigency, intransigentism, intricacy, irreconcilability, jellification, jellylikeness, laboriousness, lentor, lustihood, lustiness, mass, materiality, meticulousness, mettle, mettlesomeness, mightiness, moxie, mucilaginousness, nerve, obduracy, obstinacy, onerousness, oppressiveness, palpability, pastiness, persistence, persistency, pith, pluck, pluckiness, ponderability, potency, powerfulness, regimentation, relentlessness, resistance, restiveness, retention, rigid discipline, rigidity, rigor, rigorism, rigorousness, robustness, ropiness, ruggedness, severity, slabbiness, sliminess, snugness, solidity, soundness, spirit, spissitude, spunk, spunkiness, stability, stalwartness, staying power, steadiness, steeliness, sternness, stick-to-itiveness, stickiness, sticking power, stiff temper, stiffness, stodginess, stoniness, stout heart, strength, strength of will, strenuousness, strictness, stringency, stringiness, stubbornness, substance, substantiality, substantialness, syrupiness, tackiness, tangibility, tenaciousness, tenacity, thickening, thickness, tightness, toilsomeness, treacliness, troublesomeness, true grit, unalterability, unbendingness, unchangeability, uncompromisingness, ungivingness, unrelentingness, unyieldingness, vigor, vigorousness, viscidity, viscosity, viscousness, vitality