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.
yourn yarn yearn
bourn mourn yourn urn morn boron bourne torn diuron purin moron horn neuron buran lorn quern curn loran churn shorn rouen born porno shoran borne furan turn durn sorn korun porny burin porn corny cornu corn journo horny worn burn