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.
cum cam cwm gum cumbia coma comb gaum come camo came cameo gumma combe comae comma combo commy gumbo coomb gummy caeoma cambia cammie commie coombe