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.
choush shush chowchow chichi
choush beauish pushy pouch ouch mouch mushy bosh bush bushy lush vouch hush tushy touch woosh sushi couch rush josh cosh gosh push posh nosh mosh mush gushy gush quash chough cushy cuish tush tosh whoosh rushy wushu roshi shush
chough choush chao chow achoo echo echoey couch chowchow