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.
centare centre centaurea centaur ceinture centaury center centra century sentry senator sanitary sanitaria cinder santir santur sender sinter cindery santera santero santoor santour saunter
centare nitre antre entire entree venture jointure kantar qintar quintar ceinture centaur centre denture tantara untrue
centai cent cenote cento centu scent