Here's what rhymes with effn.
then hen sen fn fen when men ten den pen ben ken yen pn wen wenn chen denn jen ren wren again againe glen amen cayenne lawmen oilmen penmen pitchmen weathermen conmen businessmen middlemen handymen minutemen anchormen councilmen comedienne signalmen equestrienne patrolmen tragedienne Words that almost rhyme with effn
them hem femme heme feng sheng stem gem mem rem hmm pm eadem morpheme condemn ppm rpm diadem blaspheme cairn demesne fluorescein moderne relearn ramequin