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.
syren siren serein serene sorn saran sarin serin serine saurian serrano sierran sciurine
syren hereon chirren wherein tureen terrene frena serene pyrene preen murein moreen green careen gyron gyrene herein wren rein bren boreen barren arene arena pereon pyran serein siren terreen treen warren whereon yarn
saree sere sire siree sore sure