Remediation rhymes with:
mediation, mediation, irradiation, mediation, radiation, repudiation, abbreviation, affiliation, alleviation, appreciation, appropriation, association, aviacion, aviation, conciliation, creation, d'aviation, delineation, denunciation, depreciation, deviation, differentiation, dissociation, exfoliation, expatriation, expropriation, foliation, glaciation, humiliation, initiation, instantiation, irradiation, mediation, misappropriation, miscreation, negotiation, nucleation, procreation, pronunciation, radiation, reaffiliation, reconciliation, recreation, renegotiation, renunciation, repatriation, repudiation, retaliation, substantiation, variation
Remediation sounds like:
ramadan, ramtane, ramthun, random, rendina, rendition, rendon, renomination, renton, rondon, rondonia, rumination, run-down, rundown, rwandan, ryanodine