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.
groynes grayness greyness groins crones groans gurneys cronies garrons grans greenies grins goriness grannies guaranies greenness cranes kernes kroons croons greens grains crowns corneas carneys carnies coronas guaranas crannies corneous carrions guaranis queerness corns kerns carns karns kirns curns cairns cornus querns careens carinas cornice currans korunas
groynes irones dryness baroness baronies baronnes brionies heroines wryness crones ironies cronies grayness greyness neurones pyrones drones trones