worthwhile vs worthy

worthwhile is not a noun while worthy is a noun.

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

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

worthwhile (adjective)	worthy (adjective)
sufficiently valuable to justify the investment of time or interest	having worth or merit or value; being honorable or admirable
	worthy of being chosen especially as a spouse
	having qualities or abilities that merit recognition in some way