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.
shahs shaughs shaws shays sheas shes sheughs chaos shoos chase shies chais chaws chays shoes shews shows chaise chasse choughs
hahs shahs ahs has haws sheas hays shaws aahs phase haes chaws chais chase chays chias hehs chaos shays dahs yeahs
shah sha shh shaugh shaw shay shea pshaw