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.
cloudy cloud cloddy clod could clued clout clotty collude colloid clad cold clot glued cauld glady cloot glout yclad coled clade cowled coiled cooled colead coaled called keloid culled calotte collide collied cullied culotte claddagh quaalude
cloudy loud aloud bloody cloddy cloud could melody moldy mould mouldy oldy ploidy would should
calo cloy clue coulee coquille locule loculi