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.
genro genre genera ginner ginnier
genro henry inro genre keener senor denar dinero teener tenor wiener
gen gene genie genii genoa genu genua gien agene