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.
cubist cobbiest cubicity gabbiest
vibist cubist tubist tubaist chubbiest robust knobbiest ribbiest oboist nubbiest nobbiest knubbiest gabbiest babiest cobbiest bust best bast rubiest daubiest tubbiest fabbest subset webbiest shabbiest
cobias cubbies cubes cubs scubas