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.
redden redeny ridden redan redon redone retene ratteen radon retain rotten radian retine ratten retina retune retinae retinue written reattain
bidden ridden midden sodden hodden redden shodden sudden sadden madden hidden chidden den dean maiden wooden duodena deaden hoyden louden mueddin hoiden dene laden odeon deni codein fadein redeny coden leaden hoddin dudeen widen loden deny hyoidean
redd red uredia cred brede bred rued ruddy rudd reedy redo reed rediae redia rede ready readd read ired credo uredo