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.
saran saurian sarin serrano sierran sorn serin siren syren serein serene serine sciurine
saran ran barn cairn carny rani roan furane bairn airn barny murrain curran loran pirana guarana purana reearn grana rain borane saurian sierran drain durian terrain train shairn sharny yarn karn crane brawn parian grain baron varna carn earn buran furan bran reran marrano brain garni learn guarani prawn groan pyran gran sarin serrano darn drawn tarn terrane warn sharn shoran yearn
saree sari saury sear sera serai soar sora sura surah osar tsar