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.
sierran serrano saran serin siren serein serene serine saurian sorn sarin syren
sierran curran marrano murrain perron reran serrano terrain terrane ran ern
sierra serry sieur sirra sirrah sirree osier sizer ser sir