responsiveness vs responsive

responsiveness is a noun but responsive is not a noun.

Word	Noun	Adjective	Verb	Adverb
responsiveness	Yes	No	No	No
responsive	No	Yes	No	No

responsiveness (noun)	responsive (noun)
the quality of being responsive; reacting quickly; as a quality of people, it involves responding with emotion to people and events
responsive to stimulation

responsiveness (adjective)	responsive (adjective)
	readily reacting or replying to people or events or stimuli; showing emotion
	containing or using responses; alternating
	reacting to a stimulus