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.
wakens weakens weakons weakness wackiness wagons wigans waggons
kens likens quickens tokens chickens wakens weakens dickens sickens leukons weakons queans akenes takins keens daikons kenos skenes skeens kins ikons reckons buckeens pekans skins eikons pekins beckons skeans skeins queens
waken weaken weakon woken awaken