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.
less loess les lessee leys lass leas loss lies leis lees lues lasso lassi wyles lieus lease lossy lyssa lassie looeys louies looies lis las lez lice laws luce lays lase lyse laze lace lose loos lows lowse lycea hylas loose lousy louse luaus lezzy lycee louis lacey
ess fess jess guess less loess mess ness cess chess es