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.
posteen postteen postin piston pastina
posteen sateen stein steno fasten hasten listen moisten postteen cystein chasten
post paste piste poised posed posit posset postie pst