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.
whipt whippet wept whipped wipeout wiped wapiti whapped wheeped whooped whopped whupped
whipt boughpot pipet pipit dipt chapt
whip whippy whap whop whup wipe swipe