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.
mamba mama mambo mamma mammae maim mammy mamie mamey mammey mammie mammee mem mim mom mum meme memo mime mome momi mumm mumu
mamba gamba samba ama sambo jambe ambo rumba mambo iambi iamb mama limba lamby lama goombah gambia llama amah amia goombay cambia cumbia gama gamay gamb gambe gamma mamma lamb jamb lamia embay zamia
mamba mambo samba mammie mammee mamma mamey mama gambe bamboo maim lamby lambie lamb gamb gambia iamb cambia ambo jambeau jambe jamb iambi gamba mamie mammae mammey mammy sambo