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.
serum cerium seriema surimi zoarium
serum rum brume arum bohrium berme berm barium corium aurum curium grume ferrum derm drum term larum herm fermi herma germ germy jorum crumb grum quorum perm cerium forum rearm zoarium derma durum yttrium
ser sear seer sera serai sere serow serry sierra sieur suer user