Purification rhymes with:
clarification, verification, acidification, amplification, certification, cladification, clarification, classification, codification, decertification, deification, disqualification, diversification, edification, falsification, fortification, gasification, gratification, identification, intensification, justification, magnification, modification, notification, nullification, ossification, pacification, personification, qualification, ramification, ratification, recertification, reclassification, rectification, reunification, russification, sanctification, saponification, unification, verification, vilification
Purification sounds like:
perfection, propagation, proposition, provocation