Nicaraguan rhymes with:
goguen, penguin, arwen, awan, baldwin, chautauquan, edwin, gawain, genuine, goguen, harlequin, hudwon, iowan, irwin, iwen, kerwen, mequon, penguin, radwan, salwen, sequin, shawhan, urwin
Nicaraguan sounds like:
neukirchen, nickerson, nonaggression