toughness
definition: impressive difficulty
example:
speech part: noun
synonyms:
formidability
definition: the elasticity and hardness of a metal object
example:
speech part: noun
synonyms:
temper
definition: the property of being big and strong
example:
speech part: noun
synonyms:
ruggedness
definition: enduring strength and energy
example:
speech part: noun
synonyms:
stamina
staying power