Radium rhymes with:
palladium, stadium, vanadium, chriptosporidium, compendium, cryptosporidium, idiom, indium, iridium, medium, myocardium, nephridium, odiaum, palladium, plasmodium, podium, presidium, rhodium, sodium, stadium, tedium, vanadium
Radium sounds like:
raden, radiation, radin, radioman, 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