tough vs thickened

tough is a noun but thickened is not a noun.

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

tough (noun)	thickened (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)	thickened (adjective)
resistant to cutting or chewing	made or having become thick
physically toughened	made thick in consistency
not given to gentleness or sentimentality	having calluses; having skin made tough and thick through wear
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