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.
shammer shimmer shimmery shmear chamber chummier chimer chimera chimere chambray chimaera chimar
hammer shammer rammer gammer jammer yammer dammer mammer camera aimer lamber jammier ameer gummer foamer amber loamier mummer rummier dammar reamer mimer roamer seamier summer bummer limmer mummery cummer beamier shimmer hemmer shimmery rimmer chummier wommera hummer gummier gemmier maimer gamer namer gamier dimmer camber rammier foamier lamer rummer seamer simmer summery emmer tamer chamber hammier gammier yummier
shammy sham chammy shame shamoy shawm shimmy