inadequate vs incompetent

inadequate is not a noun while incompetent is a noun.

Word	Noun	Adjective	Verb	Adverb
inadequate	No	Yes	No	No
incompetent	Yes	Yes	No	No

inadequate (noun)	incompetent (noun)
	someone who is not competent to take effective action

inadequate (adjective)	incompetent (adjective)
lacking the requisite qualities or resources to meet a task	not qualified or suited for a purpose
of insufficient quantity to meet a need	legally not qualified or sufficient
	not doing a good job
	not meeting requirements
	showing lack of skill or aptitude