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.
frippery
frippery crupper tripper dropper dripper drapery preppier grippier gripper grapery cropper rapper crappier crapper wrapper ropery ripper reappear drippier trapper trippier