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.
cassena cassene cassina casein caisson cassine cassino casino casini quassin cozen cosign cosine cousin gossan cuisine gazania gossoon
cassena scena senna cassene cassina lessen ossein sen