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.
sporal spiral sprawl sporule sprawly spirally spryly superreal superalloy sparely spirula spirilla spirulae superlay superlie
sporal caporal parral poorly papyral puparial spiral sprawl superreal chaparral
spore sparry supra spurrey spry sapour sopor spar spare sparrow sapor spire spiraea spirea spiry spoor spray spree sprue spur spurry osprey