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.
gradin gradine gratin gratine guardian gratinee garden greaten keratin curtain guerdon creatin creatine gueridon cardon cordon cretin cortin craton cardoon carotin cortina grutten quartan carrotin gardenia
gradin hordein turdine sordino sordine certain reordain pieridine pardine nardine keratin guardian gratin gradine curtain creatin hirudin radian viridian verdin broaden retain reattain radon meridian ordain pertain pyridine ceratin sardine sordini sourdine uridine
grad grade garda gardai grat grate great grid gride groat grody