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.
lyssa lays loss lass leys less lyse lycea loess lassi lossy lasso lessee lassie looeys las les lis laze lace lazy lies lase lacy leas lees leis loos lose laws lues lows
lyssa assai assay bioassay byssi essay fossa fossae cassia quassia massa missay naysay ossa ossia tussah