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.
freaks phreaks forks frags fracas frocks forgoes foregoes frigs frogs frugs farragoes virgas viragos verrucas viragoes
wreaks phreaks freaks breaks creaks wrecks araks rakis harks rakus jerks quarks hayracks reeks brakes creeks crakes berks breeks parks reracks zerks drakes dreks traiks troaks charks shrieks merks rakes racks marks arecas caracks arracks barks carks barracks wracks cracks recks croaks larks carracks berakes arks narks perks sarks darks drecks tracks treks warks sharks yerks