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.
weet wet weed whet weedy wheat wat wot wed wit whit wait wite wide watt what wade white whity witty wooed
beet feet keet leet meet deet weet sheet et