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.
serin serein serine sarin serene saurian serrano sierran sorn sciurine saran siren syren
serin rin ern jarina parian marine lierne grain kerne brine dourine burin prion urine larine farina taurine bruin virion herein heroin terrine shrine murrine trine terne durian mirin erne morrion murine chorine carrion neurine ferine purine reran sarin sciurine groin briny ferny ruin quern saurian serein foreign reign brin grin kern hern rain drain coreign rein durion earn heron learn marina wyvern rerun brain reearn pereion fern hyperon serine murein murrain purin merino carina terrain narine train turion morion wherein chorion tern yearn
sri ser seizure seizer seisor seiser suer sori sierra serry sere serow serai sera seer sear sari ceria seisure seizor user