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.
scatter scattier scutter squatter secateur scoter skater squattier scouter scooter skitter skittery ciguatera sector scowder sectary skeeter skidder
scatter squatter gater scattier ciguatera cattier coater cotter cottier cutter gaiter cater secateur gutter guttier quitter boycotter locater negater cattery scutter skater skittery guttery skitter squattier