worth vs worthwhileness

worth and worthwhileness both are nouns.

Word	Noun	Adjective	Verb	Adverb
worth	Yes	Yes	No	No
worthwhileness	Yes	No	No	No

As nouns, worthwhileness is a hyponym of worth; that is, worthwhileness is a word with a more specific, narrower meaning than worth:

Other hyponyms of worth include value, merit, virtue, demerit, fault, praisworthiness, price.

worth (noun)	worthwhileness (noun)
the quality that renders something desirable or valuable or useful	value sufficient to repay time or effort spent
an indefinite quantity of something having a specified value

worth (adjective)	worthwhileness (adjective)
having a specified value
(often used ironically) worthy of being treated in a particular way