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.
rat rato rate reata riata ratty raita rad rut rot ret road raid root rota roti rete rout writ rote read roto riot rite retie write rutty readd route rotte ready redia rhyta radio rooty radii wrote rediae roadeo roadie