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