incompetent vs competent

incompetent is a noun but competent is not a noun.

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

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

incompetent (adjective)	competent (adjective)
not qualified or suited for a purpose	properly or sufficiently qualified or capable or efficient
legally not qualified or sufficient	legally qualified or sufficient
not doing a good job	adequate, but not outstanding or exceptional
not meeting requirements
showing lack of skill or aptitude