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.
peps pepos peeps paps pups pips pops popes pupas pipes poops papas popsy pupus papaws poppas popsie pappus pappies pappous pawpaws poppies puppies
beeps ceps cheeps wheeps weeps deeps zeps seeps reps veeps peps peeps neeps keps keeps jeeps yeps