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.
weakens wakens weakons weakness wagons wigans waggons
wakens weakens kens likens weakons keens kenos akenes buckeens quickens skeans skeens skeins skenes dickens takins tokens sickens chickens