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.
gregos groks grogs grigs cargos cargoes garigues crocs croaks creeks crocks crocus crooks creaks crakes croquis cariocas curacaos curacoas karaokes
gregos aerugos trigos dregs sargos largos cargos rugose rugous argosy bergs burgoos regs erugos ergs farragoes foregoes forgoes viragoes viragos cargoes rugosa pargos sorgos terraqueous choregus