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.
signees signs sickness skins squinnies sogginess segnos skeens skeins scones skenes sequins sickens skeanes skewness scans sconce skeans
signees agones beignes bigness bygones coignes kokanees lagunes doggones