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.
scarce scares scars scariose scores scaurs sucres screes scries screws sucrase soucars squares secures secrecy sowcars sucrose scarious scurries squarrose sakers sugars scours cigars seggars soakers squires suckers saggars sackers saggers saguaros skerries
scarce cares carse coarse coerce grace licorice liquorice scares squares daycares decares dekares
scar scarry scary scare scarey scoriae escar sacra scaur score screwy scree scoria scry scurry sucre screw escrow