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.
saggared saggard saggered sugared scared sacred squared scarred scried screed scored cigaret scoured secured skirred squired scurried suckered cigarette scart scrod secret
beggared saggared sugared scarred degreed sacred acred augured saggard cigaret niggard laggard jiggered haggard figured buggered cared regard greed gored garred garda caried nacred agreed scared squared guard saggered daggered shikarred
saggar sagger saggier saguaro seggar