Stefani's rhymes with:
aristophanes, symphonies, symphony's, tiffany's, aborigines, accompanies, agonies, albany's, anthony's, aristophanes, balconies, colonies, colony's, companies, companies', company's, destinies, felonies, germany's, germanys, harmonies, ironies, litanies, mutinies, peonies, symphonies, symphony's, tiffany's, tyrannies
Stefani's sounds like:
skydiving, stabbing, stabbings, staffing, staving, stebbins, steepness, stefaniak, stefanic, stefanich, stefanick, stefanik, stefanko, stefanowicz, stefanski, steffanci, steffens, stepanek, stepanian's, stepanski, stephans, stephen's, stephens, stephens's, stepping, steven's, stevens, stevens', stevens's, stiffening, stiffens, stiffness, stooping, stopping, stubbins, stuffing, suggestiveness