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.
suer ser sura sour seer sera sure sere sear serow sieur surra saury serai serry surah surrey sierra souari sir sri soar sari sora sore sori cero sire cere zero ceria saree siree sirra sorry