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.
peacoat pact picot packet pagoda picotee pagod packed peaked pecked picket pigout piquet pocket
peacoat coat coati vacate coact wyliecoat recoat dacoit cat cot act