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.
drugged dragged drugget drouked trigged darked dirked trucked torqued derogate troked direct tracked traiked trekked tricked troaked trocked
frugged drugged shrugged rugged cragged drugget dragged rerigged progged prigged frogged fragged bragged rigged raggedy ragged trigged frigged
druggie druggy drug draggy dreggy