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.
hegari hiker hacker hawker hocker hogger hokier hooker hugger hookier
hegari gar uakari sugar saggar muggar cougar jaguar jaggary vagary eggar beggary aquaria beggar agria agar acari kauri guar gaur megara cigar seggar sugary shikari