tough-skinned vs tough

tough-skinned is not a noun while tough is a noun.

Word	Noun	Adjective	Verb	Adverb
tough-skinned	No	Yes	No	No
tough	Yes	Yes	No	No

tough-skinned (noun)	tough (noun)
	an aggressive and violent young criminal
	a cruel and brutal fellow
	someone who learned to fight in the streets rather than being formally trained in the sport of boxing

tough-skinned (adjective)	tough (adjective)
insensitive to criticism	resistant to cutting or chewing
having a relatively tough outer covering	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