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.
mammae mamma mammee mammey mammie mama mammy mamie mamba momma mamey meme mumm maim mome mime mambo mimeo mommy mummy mem mim mom mum
gemmae summae mammae mae pommee comma mome meme mammey comae mamma lemma lamiae gumma gamma commie cammie femme mammie jimmie mime gimmie momma gimme pommie gemma summa mammee cymae tammie
mamma mammy mammey mammie mammee mammae hammy tammie jammy mummy cammie mommy mambo gammy ammo mamba gamma maim momma mama mumm mamey rammy mamie tammy