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.
ferrum fermi forum farm firm form from foram
ferrum rum durum zoarium cerium larum arum aurum barium bohrium brume forum jorum carrom corium crumb curium grum grume quorum marram serum drum yttrium
ferry fer faerie faery farrow fear feirie fere feria feriae fiery firry furrow furrowy furry