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.
defile deflea devil deafly defuel duffle daffily devalue dewfall devel dayfly duffel
file refile defile fil fila reveille refill puffily fille piffle beefily rifle filo fail voile goofily ruffle zoophile huffily fill duffle whiffle faille riffle flea daffily raffle baffle revile flee reflew muffle souffle coffle flew beflea vile foil flue floe fley deflea waffle shuffle