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.
sheaf sheave chef chafe chaff chief shave shiva shive shove chaffy shavie sheeve shivah shiv
sheaf haaf leaf leafy deaf chafe chaff chef chief
shea sha she shah shaugh shaw shay sheugh shew shoe pshaw sheesh sheuch