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.
maumet mammet maimed mummed mamboed mammate mammati mummied mimed mimeoed
maumet fumet met meat meet meta mete emmet fumed comet gamete gaumed mammet ramet remeet remet
mum maim imaum muumuu mama mamba mambo mamey mamie mamma mammae mammee mammey mammie mammy mumm mummy mumu imam umami