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.
carracks caracks cracks carks crakes crucks cricks crocks carcase carcass cariocas curacaos karaokes curacoas crags crocs corks cargos creaks creeks croaks crocus crooks quarks cargoes carex groks kirks quirks
wracks carracks caracks racks tracks cracks arracks barracks hayracks reracks traiks maracas rakus wricks breaks hayricks rucks drakes brocks freaks cricks wrecks derricks recks triacs troaks phreaks trucks araks tricks crocks rakis berakes rakes wreaks seracs brakes croaks fracas drecks bricks pricks rocks ricks crucks crakes touracos creaks trocks frocks turacos