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.
guaranies guaranis guaranas grannies gurneys carnies grans greenies grayness crannies grains groans cranes groynes currans carneys garrons cronies goriness greyness guernsey carns karns curns grins queerness greenness greens kernes cairns crones groins querns careens carinas cornice carrions corns kerns kirns
guaranies ranis tyrannies terranes guaranis ranees baronies birianis boranes brinies burnies furanes byrnies ironies carnies cranes crannies cronies grannies moraines trannies uranias