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.
squires squares sucres secures scurries squarrose scares skirrs scaurs skiers sugars scries scores screes scours screws sucrose sucrase suckers soucars cicorees saguaros skerries scars scarce sakers sackers saggars saggers secrecy seekers seggars soakers sowcars
requires squires quires ligures daiquiris sucres squares secures lucres faquirs figures auguries kauries guiros curies cures decuries