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.
frocked forked freaked frogged fragged frigged frugged furcate phreaked forecaddie forgot fracti foregut frigate
rocked frocked trocked crocked trucked rucked drouked recked pricked grokked forked rocket crocket corked rooked croaked cracked ricked racked reracked wracked porked troked tricked cricked troaked tracked brooked crooked wrecked wricked brocket bricked borked barracked arcked worked