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.
cassenas cassenes cassinas caissons cassines cassinos quassins gassiness cozens caseins casinos gossans gossoons queasiness
cassenas asanas paisanas missense loosens lessens cassinas cassenes caseins hausens xenias scenas snaws siennas sense sensa sennas osseins usneas
cassena cassene caisson casein cassina cassine cassino