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.
choughs chouse sheughs shaughs chose chaos chows chiaus choosy choose chowse choosey chis shahs shows chase chays chaws chess chews shoes chais shoos chias chaise chasse cheese cheesy choice wyches
boughs doughs choughs haughs heughs shaughs sheughs ohs