thorny vs thorn

thorny is not a noun while thorn is a noun.

Word	Noun	Adjective	Verb	Adverb
thorny	No	Yes	No	No
thorn	Yes	No	No	No

thorny (noun)	thorn (noun)
	something that causes irritation and annoyance
	a Germanic character of runic origin
	a small sharp-pointed tip resembling a spike on a stem or leaf

thorny (adjective)	thorn (adjective)
having or covered with protective barbs or quills or spines or thorns or setae etc.
bristling with perplexities