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.
squared squired sugared scared sacred secured scarred scoured scurried suckered saggered saggared squawroot scried squirt screed scored skirred saggard scart scrod secret cigaret secrete skirret
squared caried chequered squired secured scarred saggared required cured curred garred guard quarte cared acred augured beggared figured leaguered liquored nacred recurred sacred scared scoured quired sugared shikarred