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.
fracas frags freaks fricassee frocks verrucas frigs forks frogs frugs farragoes virgas forgoes phreaks viragos foregoes varicose viragoes
fracas maracas triacs touracos reracks narcs marcs curacaos arracks curacoas cracks cariocas ragas wracks arcs arecas carracks barcas ericas barracks verrucas hayracks gearcase caracks carcase carcass racks myricas orcas seracs tracks turacos