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.
piers peris peers pears perse peres pairs pries pierce hypers peruse paries purs peeries pros pars perries peeress parries pyres praus press prese pours prise prows proas parrs pares paras prees puris prays prize presa prosy proso priss paris pores praos pyros purrs parse pross price purse preys pursy praise pursue prissy porous pooris pareos piracy purees pareus pricey parous pariahs prossie prez
biers piers viers tiers shiers liers kiers ers virus vairs hears cooers curies juries coirs hurries haeres xerus cowries hires meres kirs verse murries paries hairs ears biros fiars jerries nairas furies harries liras zaires dories mirs cires firs sauries ferries keirs buries deers lehrs berries peers queries parries perse tries beers cheeros weirs wherries whirrs dairies dries series wires sheers cherries seers terries chirrs ceros choirs bears shirrs dearies years wearies worries veers diaries lairs kerries tiros suers pries moires ires aeries lears mairs liars nairus leers airs birrs pears feres guiros tarries sers marries carries durries errs fears perries eras kauries goers seres serries bries pairs noirs heres sears ruers shears dears gears veeries peeries jeers heirs peris cries lories heros fairies herries hoers mbiras sherries fires fairs quaeres lorries curries eyries fries verso nears hers hypers giros iris sires rears mires vires wairs tories zeros gharries varies eros birse wries quarries caries quires kyries ceres deairs corries gurries faeries queers queuers chairs sieurs wears wheres whirries whirs tears derries doers sirs tires cheers chiros terse chirus peres shires wooers shoers dowries yirrs
pier per spirea spiraea piper opera apery aper perry peri perea pereia pere peery peerie peer pear pair spier spire spiry