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.
quoin quin quinoa coin koine coign quean queen guinea con gun kin gaun goon kune cain kaon kino guan kine kina kain coon gone gown coni cony kuna gain cone koan conn
quoin foin join coign coin koine quin loin muon ruin tauon