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.
garrons carrions groins groans groynes grans guaranis grins guaranas carns karns guaranies greens kroons grains croons cairns crones crowns cronies careens carinas carnies currans carneys gurneys coronas greyness grayness greenies grannies goriness guernsey curns greenness kerns kirns corns cornus cranes kernes querns
garrons marrons perrons trones pyrones drones gyrons girons virions barons currans croons durions warrens carrions irons morons irones roans herons groans hyperons coronas borons frons frowns morions kroons crones crowns heroins groins maroons neurons barrens morrions pereons browns neurones prions diurons drowns tronas turions chorions