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.
guaranty guarantee grant gurnet garnet courant currant granita granite grantee courante couranto grunt grand carnet grained coranto groaned current grandee carinate craniate grind cornet craned ground
guaranty warranty rant tyrant brant warrant truant maranta riant runty arrant brandy randy errant hydrant coranto courant courante couranto currant grant variant jurant