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.
rifle riffle reflew raffle ruffle rifely revile refile reveille refel refly rival refeel refall rueful refill reflow refell refuel ruffly ravioli reavail revalue ruefully
rifle file whiffle duffle defile souffle vile revile reflew raffle fille flea flee flew fley floe flue faille voile baffle beflea coffle muffle piffle refile reveille riffle ruffle zoophile deflea waffle shuffle
rif reif reify rife riff griff griffe