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.
grow grew crow guiro gor gar guru gree goer guar gory grey gore gaur crew craw grue gray cowry curio gurry karoo
row vrow trow serow narrow morrow marrow grow crow harrow furrow arrow frow farrow burrow brow borrow barrow prow sorrow yarrow