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.
fretty fret ferrety fritt forty fruity ferity ferret variety fort fart frat frit fared fired fried forte fruit freed faired feared foredo furred forrit verity faraday ferrate ferried ferrite
fretty pretty treaty surety birretta arietta ariette barrette beretta ratty berretta rutty biretta burette ferrety variety curette gritty pirouette bratty grotty proette syrette cherty
fare fere fire fore frae free froe