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.
heydeys heydays hades heads heeds hides hideous hods hets haets hoods heats hates heights hoodies hoodoos hotties houdahs howdahs howdies
heydeys deys heydays maydays paydays