hopeless vs hopelessness

hopeless is not a noun while hopelessness is a noun.

Word	Noun	Adjective	Verb	Adverb
hopeless	No	Yes	No	No
hopelessness	Yes	No	No	No

hopeless (noun)	hopelessness (noun)
	the despair you feel when you have abandoned hope of comfort or success

hopeless (adjective)	hopelessness (adjective)
without hope because there seems to be no possibility of comfort or success
(informal to emphasize how bad it is) beyond hope of management or reform
certain to fail
of a person unable to do something skillfully