Futon rhymes with:
albritton, allbritton, alliston, congleton, connaughton, creviston, crunkleton, culleton, deniston, denniston, eccleston, edmiston, eggleton, egleston, elliston, embleton, hambleton, humiston, ireton, keniston, khazakhstan, krypton, lebreton, moreton, ormiston, pembleton, peniston, pingleton, poppleton, vaneaton, williston
Futon sounds like:
fadden, faden, fadiman, fathom, fatima, fatimah, fatten, fiefdom, fifteen, fithian, fitton, foodtown, footman