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.
terreen terrene treen tureen tern terrain terrane terrine terne triene trainee tarn torn turn triennia train trona tranny turion deraign tyranny
terreen barren boreen careen green greeny moreen preen terrene treen tureen warren chirren
tarre terra terrae terry stere stereo