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