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.
quassin cassina cassine cassino casein casini casino cousin caisson cassena cassene cuisine cosign cosine gossan gossoon
quassin assign scission cession raisin basin essoin fission hessian casein casini casino cassina cassine cassino mission ossein passion reassign sasin session sin
quass quassia quais quasi quays queasy aquas quags oquassa