Counteract rhymes with:
overact, artifact, autofact, backtracked, bushwhacked, carjacked, contact, contract, enviropact, hijacked, medivaced, noncontract, overact, piggybacked, ransacked, sidetracked, subcontract
Counteract sounds like:
centrist, centrust, contract, contracted, contrast, contrasted, counteracted, countersued, countersuit, counterweight, countryside