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.
hydropsy hydrops dropsy drops droops dorps drips troops drapes drupes tropes troupes towropes tarps traps trips turps trapes tripes tripos
hydropsy dropsy troops ropes roups crops croups gropes groups preops hyperopes props pyropes droops drops hydrops towropes tropes