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.
loudest lewdest leadiest latest lutist
loudest rudest nudest feudist oddest deist faddiest beadiest bawdiest baddest haddest reediest ruddiest readiest doest reddest saddest deadest dowdiest tidiest widest shadiest modest fideist moodiest hoodiest weediest seediest deediest modesty maddest headiest nudist mutest tautest neediest woodiest muddiest lewdest podesta leadiest gaudiest cutest giddiest rowdiest shoddiest
leudes lodes ludes elodeas eludes clouds