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.
skitter skittery skater scutter skeeter skidder scatter squatter skiddier scattier squattier scoter scooter scouter secateur sequitur ciguatera sector scowder sectary
quitter skitter squatter goiter boycotter quittor quieter kiter guttier guttery gutter requiter cattery cutter cottier cotter cattier scatter scutter gaiter scattier skittery squattier