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.
darn durn tarn drain drawn drone drown durion durian diuron dourine taurine deraign tern torn turn terne train treen trine trone
barn earn carn karn learn reearn darn tarn warn sharn yarn yearn