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.
pars pares paras paris pairs pears parse parrs parous pareus paries pareos purs pros pariahs parries prase pries puris praus prees proso prows pyres press preys piers priss prese pores perse peres prose purse pours proas peris prosy pyros peers prays pross purrs praos prise pursy peruse praise hypers pursue prissy purees porous pooris porose peeress peeries perries prossie prez presa price pricy prize
ars bars pars nears gnars lears maars bears boars ears guars fears feuars tears dears wears sears shears rears fiars vars gears oars knars mars lars liars cars jars gars haars hoars hears tars soars wars roars chars pears years
par para parae pare pareo pareu pariah parr parry