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.
seek skee segue sickee ska ski zek suk sec sky seg syke sick sake souk sike soke soak sock sack saki sego suck skew sika skua sook sicko skiey socko sucky
eek geek keek leek meek peek reek seek week cheek