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.
redds readds reds reads rudds redes redos reeds redoes redias readies rods rids rets rads rotes rates rides rites rodes roods roads raids reduce routes radios reatas reties rodeos radius rottes retuse writes roadeos roadies rowdies rats rots ruts
redds eds feods heads heeds geds caddis coeds feuds gaddis leads meeds meads adds redos reeds cedes seeds suedes dads deeds teds weeds needs pedes feeds reads aedes beds beads kiddos leuds meds edhs kneads odds peds feds readds redes reds rudds cedis sudds zeds deads duds weds sheds
redd red uredia cred brede bred rued ruddy rudd reedy redo reed rediae redia rede ready readd read ired credo uredo