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.
guilty guilt gault quilt kilty guild gleety gullet guiled quillet quality glut kilt cult glady gleet culti gloat culet glout glute glutei galoot clotty gulled kiltie galiot cullet gallet gallate galleta galliot galloot culotte galatea galeate galette gullied quailed quilled
guilty silty kilty milty tilt gilt laity slaty salty melty silt realty velleity wilt polity quilt kilt guilt jolty jollity jilt zloty pilot hilt fluty built lilt slitty vaulty reality fealty platy toilet faulty duality nullity milt malty lealty quality filet shelty
guile gul gaily gull gulley gully quill quillai quillaia guaiacol