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.
sucrase sucrose sucres suckers soucars scariose scars squarrose scares screes scries scaurs scarce scours sugars screws scores squares squires sackers sowcars secrecy scurries saguaros sakers skiers skirrs saggars saggers soakers
sucrase cruse decrease corse crass craws craze crease carse grease curse becurse buckras lycras necrose picaras sucrose degrease