worthless vs unworthy

worthless and unworthy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
worthless	No	Yes	No	No
unworthy	No	Yes	No	No

As adjectives, worthless and unworthy are synonyms defined as:

Other synonyms of worthless include despicable, slimy, ugly, vile, wretched.

worthless (adjective)	unworthy (adjective)
lacking in usefulness or value	lacking in value or merit
morally reprehensible	morally reprehensible
	not deserving