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.
sushi sash such sauch sashay
sushi bush choush tushy tush gushy rush rishi bushy heishi hush cuish cushy gush beauish quash lush mashie mush mushy push pushy roshi rushy dashi tushie wushu shush