counteractive vs counteract

counteractive is an adjective but counteract is not an adjective.

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

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

counteractive (verb)	counteract (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