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.
gurnet garnet grunt grant guaranty cornet guarantee carnet groined crownet courant grandee granite greened groaned current currant grained grinned granita coronet grantee grenade couranto courante grind grand ground kirned craned corned kerned kernite crooned cornuto crunode cornute crowned crinite cairned crenate coranto careened carinate coronate craniate crannied
burnet carnet cornet garnet hairnet hornet gurnet grunt darned print learned current corned gerent cairned warned earned turned jurant brunet grant front horned kerned girned mourned burnt rerent brunt crownet yarned hydrant churned errant arrant baronet torrent brent rennet reearned barned horrent learnt forint durned tyrant warrant courant coronet currant rent kirned brant parent burned sorned runt rant yearned
gurney curn garni gran grana grannie granny grin guarana guarani