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.
shush choush sheesh sheuch
hush shush wushu cushy choush whish tush rushy bush bushy hash cuish beauish tushy gushy quash lush mush mushy push pushy rush sushi gush
shush shaugh sheugh hush sheuch