One syllable words that rhyme with pen_up
behn, behne, ben, benn, benne, bren, brenn, chen, chien, dehn, dehne, den, denn, denne, en, fehn, fen, fenn, gen., glen, glenn, gren, gwen, hehn, hen, henn, henne, hren, jen, jenn, jenne, kehn, kehne, ken, kenn, kren, krenn, lehn, lehne, len, men, menn, menne, n, n., pen, penh, penn, prehn, prenn, rehn, ren, renn, renne, schwenn, sen, senn, senne, shen, sten, sven, ten, tenn, then, tien, venn, venne, wen, when, wren, wrenn, yen, yuen, zen
Two syllable words that rhyme with pen_up
again, amen, antenne, beauchesne, cayenne, courchesne, derouen, duchenne, dufresne, jiawen, lawmen, magten, ming-jen, nguyen, oilmen, pitchmen, po-jen, salmen, sheng-fen, teng-wen, un, uren