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.
lis leis lies louis lieus las les looies liaise louies less loos loci leas lice lues leys lase lyse lass lays loss lows lose laws lees lease lyssa hylas lowse louse loose loess lasso luaus lossy lousy lassi wyles lassie lessee lezzie looeys