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.
cion scion cine zin sin son zone zona soon zein sign sain sinh sone sown zine sine zoon hyson scena scene seine sinew sonny zonae
ion lion pion cion scion in on