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.
boggy biggy baggy buggy bog biog baggie biggie bag beg big bug bock book
foggy doggy moggy boggy loggy soggy buggy wiggy vuggy doggo baggy saggy eggy puggy faggy fuggy hogg quaggy nogg naggy jaggy piggy jiggy raggy biggy leggy muggy shaggy