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.
ravel ravelly revel reveal reavail ravioli reveille rival refel refly reflow rueful reflew refill refall rifely refile revile refell refuel raffle refeel revalue ruefully
gavel ravel navel level uveal kvell suavely cavil reveal naval naively lovely lively veal hovel foveal favela bevel vela veil novel kevel revel devel shovel
rave reave reavow rive rove brava brave bravi bravo crave grave gravy rarefy drave trave