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.
churn chirren chorine chorion sharn shorn shairn sharny shoran shrine
churn urn shorn curn burin burn furan hern bourn horn buran mourn journo neuron purin diuron durn bourne quern turn sharn yourn
churro churr ochreae ochre chorea chore chiru chirre chirr chiro cherry chary charry charro charr chare char ochrea ochry