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.
gyron giron gyrene girn
gyron heroin carrion iron heron irone moron hyperon neuron perron kroon marron krona prone pyrone groin diuron garron drown crone trona croon turion giron chorion irony hereon roan pyran barony corona brown frown boron morrion pereon neurone prion maroon morion virion krone syren grown drone groan durion crony trone crown whereon baron yarn