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.
scaurs scars scares scours sowcars secures soucars saguaros scarious scariose scurries scries screws scarce cigars sakers sucres sugars screes scores sucrose squares sucrase saggars saggers seggars soakers suckers squires sackers squarrose skiers skirrs secrecy seekers skerries
gaurs scaurs carrs currs kouros gars curse guars jaguars liqueurs leaguers makars scars muggurs vicars kauris bigarreaus picaros recurs becurse cigars queuers saguaros agars scours seggars sowcars sugars decares uakaris chukars shikaris faquirs gurus voguers rigours vigours kurus coarse course carse cougars liquors ligures muggars hegaris cures picaras cars figures eggars recourse beggars saggars acarus scares augurs cares curs secures soucars squares daycares dekares chequers chukkars shikars
scaur saguaro scar scare scarey scarry scary scour scurry secure escar