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.
seesaws sycees seises seizes sizes syces sises sices sauces souses sasses cesses ceases susses saices sisses cissies sassies sissies
resaws seesaws saws seesaw mesas resays resews resows