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.
apes apos apps apse appease apace apiece appose
hypes coupes types taupes dupes supes cepes popes opes ripes nappes napes mopes loupes lopes shoppes chapes gapes copes ropes shapes wipes topes tapes dopes sipes rapes pes pipes apes hopes japes jupes capes yipes