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.
rout route rut rot rote roto riot roti root rota rutty wrote rooty rotte ret rod rat rato rudd rued rate rode rete writ road rude rood rite redo riata ruddy rowdy ratty rhyta retie reata raita radio write rodeo
bout gout lout knout out pout rout tout shout ut