toughness vs tough

toughness and tough both are nouns.

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

toughness (noun)	tough (noun)
the property of being big and strong	an aggressive and violent young criminal
enduring strength and energy	a cruel and brutal fellow
impressive difficulty	someone who learned to fight in the streets rather than being formally trained in the sport of boxing
the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking

toughness (adjective)	tough (adjective)
	resistant to cutting or chewing
	physically toughened
	not given to gentleness or sentimentality
	unfortunate or hard to bear
	substantially made or constructed
	feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad')
	violent and lawless
	very difficult; severely testing stamina or resolution
	making great mental demands; hard to comprehend or solve or believe