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.
phreaks freaks forks frags fracas frocks virgas forgoes viragos
wreaks creaks phreaks freaks breaks troaks traiks dreks barracks drecks hayracks croaks rakes racks cracks reeks caracks rakus drakes tracks rakis berakes treks arecas breeks reracks arracks creeks araks wrecks brakes carracks wracks crakes recks shrieks