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.
sego seg sago segue sag sec sequoia souk soke skee soca seek sike saga sake skew scow soak sock sook syke saggy saiga sicko skiey socko soggy