Alfonsin rhymes with:
angiotensin, ansin, dancin', aflatoxin, anacin, angiotensin, ansin, bassin, carrisyn, cassin, cecin, centoxin, chacin, chasin, cossin, crossin, dancin', debrecen, dioxin, dulcine, ethelson, galitsin, haberson, hiaasen, highosin, huchison, kassin, katzin, kosin, kressin, layperson, lesesne, lessin, liesin, locsin, masin, moccasin, naprosyn, nissin, persyn, pessin, polcyn, poussin, richesin, robitussin, rossin, roxanne, rusin, russin, sarasin, shavelson, sierracin, tassin, ursin, vancomycin, vixen, yasin, yassin