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.
cercis cerises ceraceous ceruses xerosis cereuses serosas sorosis sources xeroses xeruses surcease
cercis mercies terces sources precise precis piracies pierces merces arsis lyricise curacies coerces forces farcies farces tierces
cerci ceres cereus cerias cerise ceros cerous ceruse acerose acerous