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.
cigaret cigarette scart scared secret scarred sugared secrete skirret ziggurat saggared skirt scored scried sacred squirt screed saggard scoured secured skirred squared squired zikurat
cigaret caret garret great greet aigret beggared bogart egret regreet regret saggared sugared