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.
caudle cuddle caudal cadelle caudally caudillo cattle cuttle coddle cuddly cuittle gaudily catalo coital cutely guttle cattail cattalo cattily coattail coitally
caudle buddle needle odyle nodule padle middle muddle meddle puddle piddle radulae coddle ladle huddle riddle ruddle caudal sedile fiddle daddle feudal diddle fuddle doodle aedile waddle butle widdle edile dale dele ridley tulle noddle paddle noodle peddle module mutule medley raddle poodle reddle cuddle loudly beadle idle saddle boodle sidle dole dawdle tule diddley heddle toddle addle wheedle audile yodle
cad cud scudi scud scad gaudy gaud cued cuddie cuddy coude caid cadi cade caddy caddie scudo