Exaction rhymes with:
transaction, abstraction, action, attraction, classaction, contraction, diffraction, dissatisfaction, distraction, extraction, faction, fraction, inaction, infraction, interaction, liquefaction, reaction, retraction, satisfaction, subtraction, telaction, traction, transaction
Exaction sounds like:
eastham, eastin, eastman, easton, echidna, eckstein, ecosystem, ecton, eighteen, ejection, equation, equitation, estan, esteem, estonia, estonian, excitation, execution, executone, exhaustion, exton, eyestone