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.
mammet maumet mammate mammati maimed mummed mamboed mummied mimed mimeoed
mammet emmet met lammed rammed dimmed dammed gammed summed commit jammed shammed remet comet nimmed gemmed maumet gummed hummed whammed hammed hemmed fumet mummed dammit summit rimmed remeet ramet meta meet gamete mete bammed bummed meat tommed chummed shimmed
mamma mammie mammy mammae mammee mammey mamba imam momma mummy mumm mama mamie mommy mambo maim hammam mamey umami