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.
scattier scatter squattier scutter squatter secateur scoter skater skitter scouter scooter skittery ciguatera sector scowder sectary skeeter skidder skiddier
cattier squattier scattier guttier cottier racketier goutier skittery boycotter scutter scatter ricketier cotter gutter quitter cattery skitter guttery squatter cutter dictier