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.
coder codder coater cooter cotter couter coterie cottier cuter cadre cater cutter kidder guider gadder goiter cottar quoter cattery cattier cautery couture gaudery gaudier goutier
coder beader deer chider readier voider hider wader mooter lieder ladder dowdier faddier looter nodder seeder ruddier gaudier beadier madder bidder feeder header redear leadier needer bedder eider heder lauder muddier ridder shudder shoddier chudder woodier weeder udder tedder doddery deader sadder rudery rowdier shadier footer widder hooter tooter deodar cider rioter raider budder nuder judder odor gadder powder bider kidder quoter kneader adder dere badder needier lewder reedier headier fodder aider moodier bawdier guider ruder noter dear louder fader tattooer lader loader mudder wedder hoodier voter redder chowder cooter heeder seedier leader vetoer powdery gaudery padder codder odder doer reader rooter cyder dodder toter giddier wider shedder rider rudder ceder seder deedier doter tidier wadder weedier cheder shader shooter shuddery
code codeia cod cade coda coed cooed cooeed cote coteau coude coequate coked