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.
shire shirr shier shrew share shore chirre shri choir chore shear chirr chare chiro chair shoer sheer chiru chorea sharia sherry shariah char
hire shire ire hiree quire whir moire cire sire soiree dire here shore whore chair chiro chirre choir share tire mire where zaire hare doughier hair vireo fire feirie siree lire shier heir whirr wire chare chirr chiru chore shirr shrew