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.
spheres syphers ciphers cyphers sighers savers severs sivers zephyrs suffers savories savouries savors sofars safaris saviors savours zaffers zaffres
spheres knaveries weighers syphers sighers ciphers roughers rivieres reveries reveres referees faeries liveries feres laughers gophers coughers euphroes veeries cyphers pufferies uphroes chevres