precious vs worthy

precious is not a noun while worthy is a noun.

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

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

precious (adjective)	worthy (adjective)
obviously contrived to charm	having worth or merit or value; being honorable or admirable
characterized by feeling or showing fond affection for	worthy of being chosen especially as a spouse
of high worth or cost	having qualities or abilities that merit recognition in some way
held in great esteem for admirable qualities especially of an intrinsic nature

precious (adverb)	worthy (adverb)
very