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.
cargoes cargos crags crocs karaokes carks carex garigues cariocas crooks crakes gregos crocus creeks crocks carcase caracks croquis carcass curacaos curacoas carracks corks grigs grogs groks cracks creaks cricks croaks crucks quarks
cargoes forgoes trigos sargos pargos morgues largos gregos cargos viragos foregoes viragoes farragoes erugos aerugos burgoos argues argosy reargues sorgos trokes