counteract vs counterbalance

counteract is not a noun while counterbalance is a noun.

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

As verbs, counteract and counterbalance are synonyms defined as:

counteract and counterbalance: oppose and mitigate the effects of by contrary actions

Other synonyms of counteract include countervail, neutralize.

counteract (noun)	counterbalance (noun)
	a weight that balances another weight
	a compensating equivalent
	equality of distribution

counteract (verb)	counterbalance (verb)
act in opposition to	oppose and mitigate the effects of by contrary actions
destroy property or hinder normal operations	contrast with equal weight or force
oppose or check by a counteraction	adjust for
oppose and mitigate the effects of by contrary actions