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.
lacuna lacunae lacune laguna lagune logania lagan ligan logan lagoon leukon
vicuna lacuna kuna iguana jacana coquina lacunae lacune laguna
lac lack lackey laic alack black flack clack plack slack