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.
densely tensely tinselly tenuously donzel tinsel tensile tonsil danazol
densely tensely ainsell hansel counsel gunsel tinsel tinselly unseal unsell
dense dens deans denes denies dienes dueness tense