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.
scrod sacred scared scored screed scried scrota scoured secured scarred suckered scurried scart secret saggard secrete skirred squared squired sugared saggared saggered security skywrote squawroot
scrod grody sacred negroid keycard hagrode becrowd acrid acred acaroid card cord crud crowd cred corrody corrode corody nacred record curd
sacra scour sucre scurry scry screwy screw scree scoriae scar scoria score scary scarry scarey scare escrow