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.
kraut karat krait korat karate grat kart carat crate cruet groat grate kurta great grout create curate croute carate grouty cart crit crud curt grad grit grot
kraut rat rut berate irate borate carate krait aerate jurat rout rato rate fraud grout grat cruet karate lariat maraud orate prat pruta cirrate deaerate derate hydrate treat urate great aurate phorate frat derat drat cerate serrate pirate prate lyrate narrate brute bruit carat crate trout trait ferrate fruit hereat brut errata curate grate groat karat korat gyrate brat whereat
kauri kaury kora korai kuru okra