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.
seacocks seccos squeaks seaquakes sacques squawks succuss scags skags skegs squegs
cocks bawcocks haycocks peacocks recocks seacocks cocas cocos cokes cooks recooks rococos