Open English Wordnet
Nouns
(n)counterweight, counterbalance, counterpoise, balance, equalizer, equalisera weight that balances another weight
Verbs
(v)compensate, counterbalance, correct, make up, even out, even off, even upadjust for“engineers will work to correct the effects of air resistance”
(v)counteract, countervail, neutralize, counterbalanceoppose and mitigate the effects of by contrary actions“This will counteract the foolish actions of my colleagues”