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.
sire siree sir soiree sirree sere sure sore cire sirra zaire sieur saree sierra sirrah surrey ser sri sour sari sori sear sura cere seer suer soar sora sera cirri saury serai serow serry sorry surah surra
fire hire ire quire lire mire moire cire sire zaire dire tire wire shire re