Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun toughness

4 senses of toughness

Sense 1
stamina, staying power, toughness -- (enduring strength and energy)
       => endurance -- (the power to withstand hardship or stress; "the marathon tests a runner's endurance")

Sense 2
huskiness, ruggedness, toughness -- (the property of being big and strong)
       => strength -- (the property of being physically or mentally strong; "fatigue sapped his strength")

Sense 3
temper, toughness -- (the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking)
       => elasticity, snap -- (the tendency of a body to return to its original shape after it has been stretched or compressed; "the waistband had lost its snap")

Sense 4
formidability, toughness -- (impressive difficulty)
       => difficulty, difficultness -- (the quality of being difficult; "they agreed about the difficulty of the climb")