Fieser rhymes with:
bieser, ceaser, gieser, greaser, grieser, griesser, keysor, kieser, kresa, leaser, leeser, lieser, reaser, reasor, reeser, reesor, rieser, schiesser, wieser, yeiser
Fieser sounds like:
facer, fager, faker, faucher, fauser, faxer, fecher, feeser, feezor, feger, feiger, feser, ficarra, fichera, ficker, fiebiger, fieger, figaro, figaroa, figueira, figueroa, figura, figure, fischer, fiser, fisher, fishery, fissure, fixer, fizer, fokker, foucher, fougere, fucker, fugere, fujikura, fujiwara, fusaro, fuzzier