counterweight vs equalizer

counterweight and equalizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
counterweight	Yes	No	Yes	No
equalizer	Yes	No	No	No

As nouns, counterweight and equalizer are synonyms defined as:

Other synonyms of counterweight include balance, counterbalance, counterpoise, equaliser.

counterweight (noun)	equalizer (noun)
a weight that balances another weight	a score that makes the match even
	a weight that balances another weight
	electronic equipment that reduces frequency distortion

counterweight (verb)	equalizer (verb)
constitute a counterweight or counterbalance to