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.
emmer ember emeer emery emir embar embrue
emmer dammer bummer mammer gummer summer cummer simmer dimmer hemmer jammer limmer yammer gammer rammer shimmer rummer shammer hammer mummer hummer rimmer hammier dammar loamier emery seamer beamier smear bomber lumber dimer camber omber homier foamer rhymer homer doomier dumber timer somber womera comber teemer shimmery gamier chimere chimer woomera cumber jammier gomer rammier rummier humeri foamier omer number lamber boomier roamer limier amber roomer fumer ember limber mere summery camera rimer roomier mimer comer gemmier vomer maimer member gamer mummery seemer seamier emeer aimer reamer rimier lamer boomer gammier namer ameer fumier shmear tamer timber umber wommera chamber chimera chummier gummier yummier