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.
scouter scoter scooter scutter scatter scowder squatter secateur scattier ciguatera squattier skater sector sectary skeeter skitter sequitur skittery skidder
couter scouter cautery scoter coater cooter cotter cuter cutter gutter goiter goutier quoter acuter boycotter fagoter requiter scooter scutter
scout scot scut scoot scottie scuta scute ascot escot