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.
shrew share shire shore shri chore shear sheer shier chare shirr shoer chirre chorea sharia sherry shariah char
shrew brew hare here hire crew grew drew where whore chare chore share shire shore
she shea sheugh shew shoe sheesh sheuch