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.
doulas dulias dols duels dolls dulls tolas duals diols dulse doles dalasi delays dollies doolies doylies doolees dahlias doilies doyleys delouse dels dals dahls dales tolls dials dolce tules delis deils tolus toles deals toils tools dolci dills dells talas deles tulles dalles toiles toeless dallies duellos dewless dillies dellies dialyse dailies dualize toyless tuilles toolless
doulas hulas las pulls fleas fellahs hulloas laws lass class flays ghouls lays flaws lase mullas colas galahs paellas leas mules galeas halloas caulis gulls mauls holloas glias hylas bulls hilloas fuels jouals lulls moolahs nulls shuls duels shauls cholas bolas challas chalahs souls wauls wallahs pilaus tules talas dulls dalasi violas pules nalas plays zillahs molas slaws boylas rules scillas clays pulse koalas callas queleas fellas blahs caules hollas hulls fouls hauls glass hallahs duals boules claws ulus blaws dulse chelas cauls waylays kolas culls gules balas miauls belays allays luaus pulis blase fulls alias relays guls bylaws sheilas cullays ollas mulls mullahs coalas nullahs coulis palais mollahs quillais joules moolas lulus villas galas buhls sauls chollas selahs pilaws slays sulus pleas dahlias delays puls alas dulias tolas wallas challahs yules
doula dol outlie outlaw duly dull duello diol doily dole doll dolly doolee dooly doolie doyley doyly dual dually duel duelli dulia dully idol outlay doughtily