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.
leas lease les las lass lues lees lase lies laws lays leis leys less loess luaus lieus wyles hylas lasso lycea lassi lassie looies louies lessee looeys lez lis lazy lice loss laze luce loos lacy lows lyse lose lace lacey lezzy lossy louis louse lousy lowse lycee lyssa loose
keas leas peas seas zoeas teas toeas sheas yeas as es