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.
sirrahs sirras sierras surras surahs sirs sirrees suras sires soras serais cirrus sirees sieurs cirrose serries surreys cirrous soirees sorrows sris sers soars suers sears sours saris cires seres sorus seers sores saros sarees serows series serous serosa zaires sauries seeress serious serosae souaris
hurrahs jarrahs sirrahs torahs durras surras sirras arras arrays pharaohs hoorahs horahs hurrays gerahs kerrias murras myrrhs pariahs sierras surahs dourahs terras shariahs ras
sirra sirrah sierra sirree surra sir