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.
groaned groined grained grand ground craned granite crowned greened crooned grantee grinned grandee grind crannied grant guarantee gurnet kirned garnet corned kerned coronet granita cairned grenade crownet coronate careened guaranty craniate courante coronoid carronade grunt carnet cornet crenate crinite crinoid crunode currant coranto cornute courant kernite
groaned frowned yarned trained droned darned reearned prawned learned grained crowned crooned craned corned ironed horned earned rained browned branned brained barned araneid groined marooned preowned sorned drained drowned warned yearned
groan gran grain grainy grana grannie granny groin grown groyne