Radiation rhymes with:
irradiation, irradiation, irradiation, mediation, remediation, 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, reaffiliation, reconciliation, recreation, remediation, renegotiation, renunciation, repatriation, repudiation, retaliation, substantiation, variation
Radiation sounds like:
raden, radin, radioman, radium, radman, radney, radon, radwan, rardon, raritan, rathman, rathmann, ratieni, ration, raton, rattan, rawdon, raytheon, rearden, reardon, redden, reddin, redeem, redman, redmann, redmon, redone, redwine, reitan, reitano, reiten, reitman, retain, retana, retin, retina, retinue, retton, rewritten, rhoden, rhodium, rhoten, rhoton, rhythm, ridden, riden, rietman, riordan, rittman, rodden, roden, rodham, rodime, rodin, rodine, rodino, rodman, rodney, rohatyn, rotan, rotation, roten, rothman, rotman, rotten, rottman, rottmann, rotunno, routine, routon, rowden, rowton, royden, roydon, rudani, rudden, rudeen, ruden, rudin, rudman, ruritania, rutan, ruthann, rutman, ruttan, rutten, ryden, rydman, ryton