counteract vs counteractive

counteract is not an adjective while counteractive is an adjective.

Word	Noun	Adjective	Verb	Adverb
counteract	No	No	Yes	No
counteractive	No	Yes	No	No

counteract (adjective)	counteractive (adjective)
	opposing or neutralizing or mitigating an effect by contrary action

counteract (verb)	counteractive (verb)
act in opposition to
destroy property or hinder normal operations
oppose or check by a counteraction
oppose and mitigate the effects of by contrary actions