competent vs competency

competent is not a noun while competency is a noun.

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

competent (noun)	competency (noun)
	the quality of being adequately or well qualified physically and intellectually

competent (adjective)	competency (adjective)
properly or sufficiently qualified or capable or efficient
legally qualified or sufficient
adequate, but not outstanding or exceptional