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.
palapas palps palpus plops pulps polyps pileups polypus pullups pulpous polypous
palapas laps tilapias slaps salpas relapse milpas kalpas collapse claps jalaps flaps elapse beleaps leaps lapse lapis dewlaps chalupas