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.
pennate pinnate penned pent pinned pointe panned peanut punnet peened pinite pinata peined punned pend pant pint punt paint panda panto pinto point panty pinot pinta punto punty painty panada pineta pointy
innate connate tannate pinnate pennate phonate dunnite hennaed zonate mannite senate enate connote hyphenate phenate quinnat lunate manatee cuneate lanate binate ruinate quinate sinuate lineate donate neonate
penna pennae penne penni pennia penny pinna pinnae pen