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.
seers sers seeress suers sears seres sirees sieurs sarees serous serows serosa serais series serious sris sirrees sierras soirees sirs serries soras saris sours sorus saros ceres suras sores soars zeros ceros xerus sires cerias cereus cerous sirras surras zeroes surahs sauries serosae sirrahs sorrows souaris surreys
beers cheers sheers queers deers jeers veers leers seers peers ers quaeres purees sers rears soirees hers prees ceres rees seres sirees brees verse lehrs bourrees sieurs ruers viers suers sarees shoers bears haeres wooers weirs trees terse drees cooers sirrees keirs ceros frees gears goers piers grees queuers nears eros lears xerus peres hoers cheeros creese sears feres hypers kiers zeros hears heres perse eras ears biers larees hirees meres verso peris pears liers heirs heros fears errs doers dears tears tiers wears wheres shears shiers years
seer ser sear sera serai sere serow serry sierra suer user