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.
rems reams remise remiss roms rums rims rams rimes ramus roams rooms ramees ramies ramous rhymes rimous romeos rumbas roomies rummies
ems fems haems hems gems ylems mems neems poems rems seems deems teems