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.
shewn shown sheen shawn sheeny shin shun sheenie sheeney shone shoon shine shiny shanny shinny shinney shanghai chin chon
shewn hewn hen hyphen haen sewn hwan wheen when shawn sheen shown
shew she chew chewy shaw shea sheugh shoe show showy sheesh sheuch