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.
porn porny porno pirn prune prone pyran prion purin prawn preen pernio pyrene parian pereon perron pirana purine purana pyrone hyperon pereion perinea
born horn corn lorn morn porn sorn torn worn shorn