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.
duffel duffle defuel daffily devel devil dayfly deafly defile deflea tufoli devalue dewfall
duffel feal wifely waffly duffle defuel safely ruffle rifely fell fuel baffle befell biofuel feel offal muffle piffle raffle refeel refel refell refuel riffle ruffly souffle coffle waffle whiffle shuffle
duff daff daffy diff doff tuff