Here's what rhymes with swefn.
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 weathermen lawmen oilmen penmen pitchmen conmen businessmen middlemen handymen minutemen anchormen equestrienne councilmen comedienne signalmen patrolmen tragedienne Words that almost rhyme with swefn
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