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.
dulls duellos dolls dells dulse duals duels dills dulias tulles doulas dalles dels dals dallies dillies tuilles dollies dols dellies diols deles delis tells tules talls dahls deals dials dales tolls doles deils tills dalasi tellys tallis delays doylies tallies doolies dailies dialyse dualize doilies dahlias doolees dewless doyleys tallows tailles tellies delouse tailless toolless tels tils
bulls mulls nulls culls pulls gulls hulls dulls lulls fulls ghylls ghouls molls boules hollas kills maills falls jills fillos caules guls miauls hells caulis hullos villas sulus jellos sauls hallos vills cellos mullas milles joules mills hellos phallus ballsy bills calls ollas balls pules shells pulse hauls tailles talls dills tellys ulus tolls walls wells challas chillis shuls yills duellos tules gills rouilles malls ills selles mells jells ells sills chollas fouls bolls pills dalles gallus doulas rills scillas follis hulas fills rilles hillos boulles mauls failles quells fellas quolls coulis galls gules callus buhls cells jouals niellos knells fells filles hills nills halls folles villus pulis duels hollos belles phyllos quills knolls lulus fuels paellas rules duals callas rolls lalls alls palls chills bells cauls mules lolls cullis souls polls puls tuilles shauls tulles dells dolls dulse tallis sells tells tills zills wallas wauls wills challis shills yells yules
dull dully duly dally dell delly dill dilly doll doula dolly dual dually duel duelli duello dulia tulle