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.
denture denature denuder tenter daunter dinitro donator tentier daintier tentoria tantra tinter tinder tender dander tundra dandier daunder tantara taunter tindery
venture denture ceinture jointure santur entree contour century coendure centaur geniture rondure renature antre entire venturi nitre nature centare centre santour denature endure miniature untrue