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.
crude crud cruet croute cruddy corrode corrade card crowdie cred cord curd cardiae cored credo crate cared cured crowd caret curet cried creed caird gride carte grade curdy carate crowdy curate corody curred caried gourde cardia cardio curite create cowrote curried curette cowrite corrida carried corrody cart crit curt grad grid
rude prude crude hydride trade joyrode deride boride gourde rede brute burdie erode irade charade bourride hayride gride bride merde pardee perdie pride fraud birdie trued rode barde cruet proud crud corrode brede corrade ride virtue horde joyride grade rued rudd maraud parade pardie perdue sarode druid tirade trode weirdie shroud