endurance vs toughness

endurance and toughness both are nouns.

Word	Noun	Adjective	Verb	Adverb
endurance	Yes	No	No	No
toughness	Yes	No	No	No

As nouns, toughness is a hyponym of endurance; that is, toughness is a word with a more specific, narrower meaning than endurance:

Other hyponyms of endurance include sufferance, stamina, staying power, long-sufferance, long-suffering, tolerance.

endurance (noun)	toughness (noun)
the power to withstand hardship or stress	the property of being big and strong
a state of surviving; remaining alive	enduring strength and energy
	impressive difficulty
	the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking