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