strong vs tough

strong is not a noun while tough is a noun.

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

strong (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

strong (adjective)	tough (adjective)
having strength or power greater than average or expected	resistant to cutting or chewing
having a strong physiological or chemical effect	physically toughened
being distilled rather than fermented; having a high alcoholic content	not given to gentleness or sentimentality
strong and sure	unfortunate or hard to bear
freshly made or left	substantially made or constructed
not faint or feeble	feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad')
immune to attack; incapable of being tampered with	violent and lawless
of verbs not having standard (or regular) inflection	very difficult; severely testing stamina or resolution
having or wielding force or authority	making great mental demands; hard to comprehend or solve or believe
of good quality and condition; solidly built