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.
apart apparat aport appeared
part apart depart apparat pard party peart pert port prat spurt aport biparty spirt leopard rapport report seaport sport sprit support jeopard sprat deport