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.
curacaos curacoas cracks caracks carracks crocs crags crocks cricks crooks cargos croaks crakes creaks crucks cargoes cariocas karaokes carks corks grogs groks creeks crocus gregos quarks quirks
curacaos barcas fracas curacoas maracas narcos touracos turacos turacous
curacao curacoa carack crack cracky