effectiveness vs effective

effectiveness is a noun but effective is not a noun.

Word	Noun	Adjective	Verb	Adverb
effectiveness	Yes	No	No	No
effective	No	Yes	No	No

effectiveness (noun)	effective (noun)
power to be effective; the quality of being able to bring about an effect
capacity to produce strong physiological or chemical effects

effectiveness (adjective)	effective (adjective)
	producing or capable of producing an intended result or having a striking effect
	existing in fact; not theoretical; real
	able to accomplish a purpose; functioning effectively
	works well as a means or remedy
	ready for service
	exerting force or influence