Iwen rhymes with:
arwen, awan, baldwin, chautauquan, edwin, gawain, genuine, goguen, harlequin, hudwon, iowan, irwin, kerwen, mequon, nicaraguan, penguin, radwan, salwen, sequin, shawhan, urwin
Iwen sounds like:
i'm, iain, ian, ianni, iannone, ihnen, im, imai, imam, iman, imm, immu, immune, immuno, imo, in, in., ina, inane, inhuman, inhumane, inman, inmon, inn, inno, inoue, inouye, iny, ion, iona, ione, iowan, iwan