Spleen rhymes with:
plein, aileen, aleen, alene, arleen, baleen, carleen, cathleen, celine, charleen, charlene, charline, clean, coleen, colleen, d'alene, doralin, eileen, filene, gallien, glean, helene, jolene, kathalene, kathleen, killeen, kleen, lean, leen, lein, lene, lien, lurleen, madelene, marleen, marleene, mcclean, mclean, moline, myrlene, olean, pauline, philene, plein, propylene, salin, saline, selene, sharleen, shirleen, trampoline, unclean, wileen
Spleen sounds like:
sabalan, sablan, schieffelin, scopolamine, sephlon, shevlin, shovlin, sjoblom, sobelman, spallone, speelman, spellman, spelman, spielman, spielmann, spillane, spillman, spilman, splain, splaine, splawn, sublime