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.
serif serf surf serve servo surfy ceriph seraph zarf
serif sherif rif verify reif reify rife riff brief aerify tariff horrify grief kerf purify rarify serf terrify sharif griff torrify sheriff
sri ser seizure seizer seisor seiser suer sori sierra serry sere serow serai sera seer sear sari ceria seisure seizor user