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.
detain detainee detinue deaden tetany dittany titan dudeen tauten duodena titania
attain tain reattain retain stain detain tan tin satin titan rattan retina phytane botany gittin betaine ratine dittany tine mattin patine biotin butane latina tiny stein tetany witan poutine shaitan ratany chitin mutine litany rutin phytin retine lattin patina cutin ratan seitan stane cetane mutiny latino satiny lutein matin patin routine cotan zeatin soutane gitano sheitan
data dead deet deity diet dita duet ideate metate dieted dueted duetted