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.
derat derate drat deaerate dart dirt hydrate dorty treat droit dread trait dirty deride dorado terete terret territ treaty deaired tart tort trad tret trot
derat rat errata aerate ferrate karat kraut korat laureate grat merit great borate orate create jurat pert prat heart cerate irate serrate phorate brat beret drat trait treaty wert chert carate vert groat peart frat rate vertu aureate berate aurate karate lariat krait lyrate narrate grate reata curate rato crate pirate carat prate hereat cirrate gyrate deaerate derate hydrate treat urate whereat cherty
deray deair dear dearie deary deer dere derry doer draw dray dura terai deader