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.
shes sheas shoes shies shews sheughs shows shaws shays shahs chews chess shoos cheese cheesy wyches shaughs chez chase chose
she shea sheugh shew sheesh sheuch sh