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.
agora agorae agria agar agger aggro agree augur augury aquaria acre
agora gor rigour pakora megara coria goer gore gory gray kora agorae korai agria begorah begorra vigor vigour jagra okra rigor scoria