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.
giron girn gyron gyrene
iron giron heroin heron irone girn frown irony hereon gyron cairny corona crony crown groan kroon krona marron morion morrion neurone pereion perron prion pyrone diuron drown trona turion chorion grown virion brown krone briony roan boron barony baron bairn airn firn cairn carrion crone croon garron kirn groin maroon mirin moron neuron hyperon pereon pirn prone siren drone durion trone whereon shairn