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.
rete retie ret rate rote reed rite rede reedy reata wrote rotte route write rediae red rut rat rot riot rude rode read rato rota redd ride root redo roti writ rued roto rout redia rutty rhyta readd rodeo raita riata wried ratty ready rooty