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.
appeared apparat apart aport
coappeared appeared speared reappeared rapiered chippered paired diapered pared supered parred speired spared peppered capered kippered repaired coppered paupered sparred lappered peered speered coopered spiered lippered zippered loppered tapered papered choppered