worthy vs exemplary

worthy is a noun but exemplary is not a noun.

Word	Noun	Adjective	Verb	Adverb
worthy	Yes	Yes	No	No
exemplary	No	Yes	No	No

worthy (noun)	exemplary (noun)
an important, honorable person (word is often used humorously)

worthy (adjective)	exemplary (adjective)
having worth or merit or value; being honorable or admirable	serving to warn
worthy of being chosen especially as a spouse	being or serving as an illustration of a type
having qualities or abilities that merit recognition in some way	worthy of imitation