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.
mammal mammilla mammillae mumble mumbly
hammal gimmal mammal tombal tamale hamal domal haemal sambal email remail kamala pummel gimbal female hiemal hemal hamaul maul bummalo mall timbal tamal small cymbal ramal camail pommel kummel comal jumbal mail male meal tymbal
mamma mammie mammy mammae mammee mammey mamba imam momma mummy mumm mama mamie mommy mambo maim hammam mamey umami