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.
parrs pars parries paras pairs purrs pares pears paris parse pareos parous paries pareus perries pros pariahs purs pores proso proas prees prise prows perse pyres press praus prese pries peris piers priss purse pours praos peers preys prose pyros peres pross pursy puris prays prase prosy pursue praise peruse prissy porose pooris porous purees hypers peeress peeries prossie prez
gnarrs carrs charrs parrs ars birrs maras murres errs feuars mars charros vars bares gears bars arris gharris faros hearse pairs ares airs murras fairs arse pars paris orris currs hares jars gaurs laris fiars arras knars wairs years shirrs terras shears churrs tarres chirrs chars vairs charas whirrs roars wars dares nares pears sirras tarsi murrs tares sears dorrs durrs barres dears bears souaris nears maars gnars carse liars guars hears fares hoars boars purrs tahrs lears sierras mares paras taros haars saros hairs rares pharos knaurs pares fears ears mairs lars burros naris varas coarse oars saris hoarse lairs durras cares varus lares cars gars surras myrrhs derris marse rears burrs morros tars parse tears soars torrs deairs wares wears cirrus chairs chares morris chirres churros shares sherris tiaras yirrs
parry parr par pear sparrow spare spar purr perry pareu pariah pareo pare parae para pair sparry