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.
mammees mammies mammeys mamies mameys mammas mummies mamboes mommies maims mumms momes mamas memes mimes mambas mambos mimeos mems moms mums memos momus mumus mommas muumuus
mammees jimmies shimmies shammes whammies tommies dummies ramees mummies immies gimmes gimmies jammies jemmies femmes commies cammies mammeys mammies memes mimes momes mommies pommies rummies tammies tummies chammies shammies yummies
mammee mammey mamey mamie mamma mammae mammie mammy