sturdiness (noun) sturdiness: stability
Sinonime: adherence,
aplomb,
assurance,
backbone*,
balance,
cohesion, constancy, dependability,
determination, durability,
endurance,
establishment, fastness, firmness, hardness, immobility, immovability,
maturity, permanence,
perseverance, resoluteness,
security, solidity, solidness, soundness, stableness, steadfastness, steadiness,
strength, substantiality,
support, sureness, toughness