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.
cousin cosine cosign cuisine casein casini casino cassino cassine cassina quassin cozen gossan caisson cassena cassene gossoon
cousin sin hessian casein casini cassina cassino cosine hausen fission cosign lysine leucin mucin passion raisiny resign resiny rosiny cession scission session cuisine fusain eosine lysin eosin sain basin assign sinh sine cassine sign casino quassin essoin mission ossein raisin reassign resin rosin rusine sasin seisin design
cos cosy cogs causey coos cosey cosie coss cause coys cows cues cuisse cuss cusso kousso ecus scouse