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.
sieurs sirs sers sierras sires sours suras seres sears suers seers serows sirras surahs serosa serous surras series sirees seeress serosae serries sirrahs sirrees sauries surreys serious soirees sris soars saros soras saris sores sorus cereus sarees serais source sorrows souaris
sieurs ers bursa puris burrs burs verse goers quaeres heres feuars eras houris peris furs kouros reuse cereus lehrs keirs hers nears pareus bureaus viers mures euros jeers feres gears course buras sears gurus hears tears years duros shiers shears doers cheers wooers dears weirs urus suers uraeus tiers ruers currs errs duras peers meres knaurs lours pursy xerus buhrs bourse lears piers purs queuers ours seres heirs curse queers eros ceros pears curs heros ferreous guars aureus kiers purrs biers gaurs ears leers bears knurs hours verso murrs auris hoers aures haeres beers auras kurus nurse cures veers fears giaours burse fours liers pours lures seers ceres lauras kauris rears suras muras perse peres hypers purse douras cooers durrs sers terse tours sours ursa wears zeros wheres cheeros deers churrs sheers dures shoers yours
sieur sierra sire siree osier sizer