unworthy vs worthless

unworthy and worthless both are adjectives.

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

As adjectives, unworthy and worthless are synonyms defined as:

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

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