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.
saguaros saggars sugars scaurs squarrose sucrose seggars saggers squares soucars scariose scarious scars sucres sakers scours cigars scares suckers squires soakers sackers sowcars secures scurries scarce scores screes screws scries skiers skirrs
saguaros curios sugars soucars guars guiros karoos kaross kouros agarose buckaroos buckayros vaqueros jackaroos jaguars cougars macros picaros squares chukars