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.
gladier gladder golder glider guilder glitter gloater cloudier coleader guiltier cloddier glittery gleetier gauleiter colder caldera clatter clowder clattery collider colluder killdeer colter kelter kilter clouter clutter coulter quilter
leadier gladier soldiery slatier pleader plaiter moldier coleader cloudier cloddier floatier bloodier blader balladeer balder bladder alder loader leader lauder lader gladder ladder mouldier platier reloader soldier wieldier