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.
cushy cuish gushy cushaw cash cosh gush couch cutch quash cashaw cashew cashoo catchy gash gosh
bushy gushy mushy pushy rushy tushy cushy shy push duchy tush hush ashy shay pouchy sashay quash rush choush cuish sushi lush washy gush wushu dashy dishy mush mashy bush meshy beauish touchy fishy shush