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.
eyras eras erase eyres ers eyries ears eros errs erose euros aeries
eyras ras paras craws horas varas rias hurrays areas raws eras muras eyres frays brays hoorays gyrase harass rays nairas rase brass mbiras byres erase lyres morass forays prays sharias hydras charas ureas duras yttrias tyres dourahs trass torahs terais sierras pyres gyros prase cerias draws lauras surras kerrias sirras surahs jarrahs grass buras rais grays bras braes moras boras bewrays norias arrays hoorahs gyres horahs boreas phrase ferias murras arias auras braws gerahs arras varias hurrahs cuirass praos maras frass morays sirrahs crass suras soras koras derays liras drays serais praus gyrus pyros terras proas toras trays douras tyros urase durras whereas choreas hydrase tiaras