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.
shorn shoran sharn shairn sharny shrine chorine chorion churn chirren
horn shorn born sorn porno mourn moron morn lorn loran korun cornu corny corn worn hern bourn boron borne porn porny torn churn shoran horny sharn yourn
shore chore chorea share sharia shariah sherry shire shirr shoer shrew shri ashore