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