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.
whort wort whored worrit wart wert whereat word warty wordy whereto whirred worried wherried whirried ward
short whort ort chart torot aorta sorta sort port mort korat court hart hurt forty bort fort boart dorty tort torte forte torta wort chert shirt borty chord shorty
whore where wherry whir whirr whirry wore worry swore