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.
rot rota root roti roto rote riot rout route wrote rooty rotte rut ret rat rod rate rite rete rato rood writ road redo rode write retie rodeo rhyta raita radio ratty rowdy riata rutty reata roadeo roadie