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.
sorta sort sortie sord sored soared soured surety seriate serrate syrette sard surd sourdough
sorta torta aorta ort shorty orad wort forty fort rota mort tort dorty pruta court sort torte protea kurta bort boart baryta aortae forte port korat torot whort errata short borty yurta
soar soiree sora sore sori sorrow sorry sour