I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
selahs sels sells slays seels slaws seals selles zillahs scillas sals sols cels sales slues sauls slews sylis cells soles sails solos salsa sloes sills souls silos solus slows soils sulus cellos sleazy sleaze solace soleus sleazo sallies sallows sillies sullies sailless soilless soulless
blahs fellahs selahs challahs mullahs nullahs mollahs chalahs wallahs moolahs hallahs galahs zillahs las callas holloas palais alas halloas claws fellas hollas blaws lase doulas relays dahlias flaws villas hylas pilaws talas molas chollas chelas dalasi boylas cullays wallas tolas moolas dulias slays bolas fleas glass alias mullas slaws lays ollas scillas koalas colas lass pilaus bylaws coalas class delays blase dahls galas hulloas hilloas quillais allays kolas laws plays queleas waylays clays pleas belays violas hulas flays galeas paellas chalehs balas leas nalas glias challas cholas sheilas
selah sel seal seel seely sell selle slaw slay sola