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.
nifties nighties naiveties naivetes naughties nights knights navettes neophytes naughts navaids noughts
lefties softies fifties nifties naiveties giftees safeties levities refutes nighties naughties cavities muftis eighties footies fetes fatties fates righties suavities