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.
scat scatt scatty sect skat scut scot scad skate scute squat scoot scuta scout socket scottie sickout squatty scud skit cycad scudi scudo skeet skite squad