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.
merit mart mort muriate merde murid myriad married
merit britt verite beret brit barite parity purity periti yperite krait burrito griot rewrite derat crit droit jerid trait vert wert heart chariot writ chert write rite riot rarity fruit ferrite ferity forrit norite pert peart pyrite grit lariat curite cerite bruit cowrite diorite heriot territ verity trite vertu worrit fritt charity frit cherty
maria mere merry miri emery omer