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.
serein serin serene serine sarin siren syren saurian serrano sierran sorn sciurine saran
rein wherein serein herein murein rin boreen green hereon coreign farina carrion careen grain briny pyrene frena bruin larine brain brine wren arena rain burin mirin arene chorion chirren serin urine murrine tureen treen preen terrine terreen groin jarina pereion neurine saurian purin marine marina reign taurine ruin pereon sarin morion dourine merino grin carina narine murrain prion gyrene bren murine moreen durian foreign serene morrion ferine syren heroin durion siren purine barren brin serine sciurine parian virion terrain drain terrene train trine turion warren whereon chorine shrine
sere ser sure suer sore siree sire sierra serow serry serai sera seer sear saree cere user