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.
lassie lassi lase lass lasso lease liaise las lessee lays loss lyse leas lice lace less laze lies laws lose loose lowse lieus hylas loess louse lossy lacey luaus lyssa lezzie looies louies les lez lis
gussie lassie poussie tassie dassie tusseh passe ossia cosie fesse fosse newsie masse issue lassi quassia gawsie cassia posse byssi cuisse reissue tissue fossae tasse sice assai size passee issei mousse jesse lessee bassi wrasse chasse