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.
skirrs skiers skerries sakers soakers suckers sackers seekers squires scurries scars squarrose scaurs scries cigars scares screes sucres scores sugars screws scours saggars saggers seggars soucars squares secures sucrase sucrose sowcars saguaros scariose scarious
skirrs carrs coirs currs guiros keirs kiers kirs quires fakirs faqirs faquirs requires skiers squires daiquiris