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.
sri sari sori serai souari sir ser sere suer soar seer sera zori sura sore sure sire sora sour sear surah cirri sorry saury serry saree surra sieur siree serow ceria sirra sierra sirrah sirree soiree sorrow surrey zoaria