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.
oddity outadd oidioid
quiddity oddity nudity dit dite cheddite doty reedit dita diet lyddite idiot ditty coedit viduity didy edit titty adit audit fatuity deity doit podite duit satiety duty chedite