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.
littoral litoral literal literally lateral latterly laterally
littoral litoral sutural citral retral trail trawl trial atrial butyral futural lateral guttural literal mitral natural neutral petrale peytral retrial sudoral tutorial
litter littery flitter glitter glittery slitter slittier