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.
scours scores scaurs soucars secures scars scarious scurries scries scares sugars screes screws sucres squires soakers sucrose sucrase squares sackers suckers sowcars cicorees scariose cigars scarce skiers sakers skirrs saggars saggers secrecy seekers seggars saguaros skerries
vigours scours rigours secures curse cors augurs currs curious curs faquirs vigorous vagarious carouse queuers cures cooers decors kouros koras liquors gurus muggurs gorse pakoras grouse recurs gaurs scarious scores rigors ligures corse jaguars kauris cores figures vigors vicarious voguers agoras leaguers becurse liqueurs gores nacreous mucors kors gorsy recourse guars rigorous coirs course crouse scaurs carious kurus goers decorous chequers
scour scaur score scoria scoriae scurry secure soucar