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.
cuish cushy cushaw cash cosh gush quash gushy cutch couch cashaw cashew cashoo quiche quitch gash gosh
cuish beauish gushy quash lush mush mushy pish rishi push rushy dish tush whish wisha choush gush cushy geisha pushy heishi fishy fish bushy bush knish poisha hush rush sushi dishy tushy wish wushu shush