Flessner rhymes with:
flesner, flesner, glessner, lesner, lessner, besner, essner, flesner, gesner, gessner, glessner, kesner, kessner, lesner, lessner, mesner, messner, resner, wesner, wessner
Flessner sounds like:
falconer, falconry, falkner, faulconer, faulkner, felgenhauer, felkner, fleissner, flesner, flexnor