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.
decrease degrease decares decrees decries decuries decors deckers dekares degrees daycares decorous doggeries dikers dockers duikers duckers doggers dackers digress diggers dickers daikers daggers taquerias toggeries takers tokers
crease grease decrease degrease creasy creese greasy bigarreaus sucrase
decree decare decker decor decry decury degree