Duffin rhymes with:
buffin, guffin, ruffin, alfin, alphin, buffin, chaffin, chafin, chalfin, coffin, cyrofin, daffin, dauphin, delfin, diffin, dystrophin, elfin, endorphin, gaffin, giffin, goffin, golphin, griffin, guffin, hanafin, hanifin, hannifin, kniffin, laffin, morfin, murfin, myotrophin, olefin, polyolefin, rofin, ruffin, sarafin, serafin, serfin, superfon, sutfin, sutphin, threadfin, tiffin, woodfin
Duffin sounds like:
dabney, daffin, dafna, daphne, dauphin, dauphinee, davin, davina, davino, deadpan, deafen, debaun, debnam, debona, debono, deepen, defame, defina, define, defino, dehaven, depina, deppen, devan, devane, devaney, devany, deveney, devenney, devenny, deveny, devin, devine, deviney, devinney, devino, devon, devona, devonian, diaphonia, dibona, dibuono, diffin, difm, divan, diven, divine, diviney, dobbin, dopamine, dubin, dubinin, dupin