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.
mambo mamba maim mama memo mammy mamma mamie mimeo mamey mammee mammie mammae mammey mem mim mom mum meme mime mome momi mumm mumu
ambo sambo mambo gumbo whamo gambe umbo gamba dumbo gombo gamb samba limbo cameo mamba lamby combo bamboo camo jumbo lamb jamb ammo iambi iamb embow bimbo jambe tomboy whammo shamoy
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