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.
caisson cassena cassene cassina cassine cassino casino casini casein cuisine gossoon quassin cozen cosign cosine cousin gossan
caisson mission session scission cession poison passion liaison bassoon lesson gossoon foison fission essoin bison disown son