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.
scutter scatter scouter squatter scattier scoter squattier skitter scooter skittery secateur ciguatera sector skater scowder sectary skeeter sequitur skidder
cutter gutter scutter quoter squatter quitter skitter requiter guttier scouter scatter boycotter acuter guttery cattery goutier scattier couter cottier cotter cautery cattier cuter skittery squattier
scut scatt scatty scottie scout scuta scute