Lappen rhymes with:
happen, tappan, tappen, alagappan, aspen, campen, capen, cheapen, compean, copen, crippen, crispen, dampen, deepen, deppen, eappen, flippen, happen, hempen, hippen, kampen, karpen, kempen, koeppen, koppen, lupin, mcalpin, misshapen, open, phippen, pippen, poppen, reopen, ripen, rippon, saipan, sharpen, stepan, supan, tappan, tappen, tarpon, thigpen, thomspon, tippen, turpen, vancampen, vankampen, weapon, yaupon, zupan
Lappen sounds like:
laban, labine, laffin, laffoon, lafon, lapan, lapenna, lapham, lapiana, lapin, lapine, lappin, laubhan, lavan, laven, lavin, lavina, lavine, lavinia, leaven, lebanon, leben, lebon, leibman, lepine, leppanen, levan, levana, leven, levene, levien, levin, levina, levine, libman, libyan, liebenow, liebman, liebmann, lipham, lipman, lippman, lippmann, lipuma, livan, liven, livin', livonia, lobban, lopeman, loppnow, lovan, loven, lovin, lpn, lubben, lubin, luevano, luffman, lupien, lupin, lupine, lupone, luppino, luvena