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.
sris saris series serais sers sirs serries souaris serious sauries suers sears sorus sires suras sores sours seres seers zoris saros soras soars sirees sirras cerias serous cerise sieurs surahs serows surras serosa sarees seeress serosae sierras sirrahs sirrees soirees sorrows surreys cerci
arris kauris sherris zoris souaris puris peris orris noris naris morris loris laris kris cris auris iris houris gharris hybris bris paris pooris saris sris derris shris