tough vs hardened

tough is a noun but hardened is not a noun.

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

tough (noun)	hardened (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 (adjective)	hardened (adjective)
resistant to cutting or chewing	made hard or flexible or resilient especially by heat treatment
physically toughened	protected against attack (especially by nuclear weapons)
not given to gentleness or sentimentality	made tough by habitual exposure
unfortunate or hard to bear	converted to solid form (as concrete)
substantially made or constructed	used of persons; emotionally hardened
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