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.
scud scudo scudi scad scut scout squid scuta scute squad sacked segued socked sicked sucked sickout scat scot skid sect cycad scatt scoot skeed skied squat