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.
ruffle riffle ruffly raffle rifle reflew refile rueful ruefully refly refel refuel refell revile rifely refeel reflow refall refill revalue roughly reveille
baffle raffle piffle souffle muffle duffle shuffle waffle ruffle coffle riffle whiffle refile floe offal flee beflea duffel defile deflea flue rifle file fley flea reflew waffly flew ruffly
ruff ruffe raff raffia riff gruff gruffy truffe