Overwhelms rhymes with:
elmes, elms, helmes, helms, helms', nelms, realms, alms, barthelme's, elmes, elms, film's, films, helmes, helms, helms', hilmes, nelms, psalms, quilmes, realms, stockholm's, wilhelms, willms, wilmes, wilms
Overwhelms sounds like:
overhauling, overlying, overreliance, overruling, overwhelming