Overact rhymes with:
counteract, artifact, autofact, backtracked, bushwhacked, carjacked, contact, contract, counteract, enviropact, hijacked, medivaced, noncontract, piggybacked, ransacked, sidetracked, subcontract
Overact sounds like:
o'brecht, oberst, obrecht, oppressed, overacted, overcast, overcoat, overcooked, overexcite, overexcited, overjoyed, overreached, overreact, overreacted, overshadow, overshadowed, overshoot, overshot, oversight, oversized, overstate, overstated, overstay, overstayed, overused, overweight, overweighted, overworked, overwrought