Smothermon rhymes with:
shimon, shimone, aiton, aon, bastone, briggstone, brimstone, cellphone, cerbone, citroen, gambone, glendon, halcyone, hendon, keown, ketone, lactone, marylebone, milhoan, moton, okon, pharaon, pistone, provolone, rendon, shadoan, shimon, shimone, tabone
Smothermon sounds like:
sanhedrin, santorum, schneiderman, skenderian, smithereen, smitherman, smotherman, sonderman, sumatran, sunderman, symtron, syndrome