Retain rhymes with:
aquitaine, detain, abstain, aquitaine, ascertain, attain, brattain, buntain, butane, chastain, contain, costain, detain, entertain, fontaine, fountaine, lafountain, lafountaine, lamontagne, maintain, mustain, obtain, partain, pertain, petain, sartain, stain, sustain, uptain
Retain sounds like:
raden, radiation, 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, 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