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