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.
scooter scoter scouter scatter scowder scutter scattier secateur skater sector sectary skeeter skitter skittery squatter ciguatera squattier skidder
scooter cooter coater cotter couter goiter quoter boycotter fagoter scoter scouter
scoot scot scottie scout ascot escot