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.
cassine cassina cassene cassino casein casini casino cosine caisson cassena cuisine quassin cosign cousin gossan gossoon
cassine sine session sasin rusine piscine ossein mission quassin seine sinew assign eosine essoin fascine fission hessian cassene cassina cassino cosine cuisine lysine oscine passion reassign cession scission hyoscine sin