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.
lieder lewder leader lader lidar liter letter loader litter ladder loiter lauder louder leadier littery later litre latter looter lotter lottery
feeder seder weeder ceder cheder needer seeder heeder heder lieder quieter bedder readier dear leadier ladder woodier lewder bidder odder hoodier lader madder headier peter nuder bawdier reader widder badder rowdier voider mudder meter ruddier louder dowdier shudder sheeter shadier chudder chider seedier deer wader udder teeter deter loader dodder ridder deader rudery meeter cyder adder powdery rider dere eider coder giddier redder rudder lauder redear wadder kidder raider judder nodder moodier gaudier codder reedier ruder doer beader faddier padder kneader wedder redry fodder header budder gaudery powder sadder leader dieter gadder guider beadier pedro bider cider cedar fader steer hider muddier doddery deedier tedder tidier aider weedier wider needier chowder shader shedder shoddier shuddery
lied lid led fled slid elide plied bled glide loid gled flied lido lite lewd leud leady lead laid glede pled sled slide