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.
polys pols polis pools plays ploys poles polls polos policy polies poleis polios poilus pulleys pollees puls pals plus peels peals palsy pawls piles peles pilis pules plies pulis palls pilus pills pails pleas pulse plews plows pulls pales pilaus pilose pilous plisse police pilaws please palais pileus paellas pelisse pileous pillows paillasse palliasse
polys baileys holes tools knolls foils valleys dols koels cullays coils sols bolos gaols moils reoils polis jowls belays goals boils bowls fools noils cools quolls bialys bolls fowls coles kolas oils shools sheols wholes tolls tellys doles souls soles roles pulleys polos ploys cholas fleys tolas viols dialyse slays voles owls muleys boles moles volleys mols howls mooleys bolas cloys coals kolos aiolis looeys alleys lolls cowls nolos fouls flays allays gulleys alloys clays polls molas leys gleys bolus solus colas galleys kohls doyleys violas foleys noels waylays hols ghouls roils cols foals mools joles moolas haoles molls lyse mulleys plays pools soils diols lays toles cholos oles poles pols relays rolls solos delays dolls toils tolus wools shoals yowls
poly pol ply paly pily play ploy poilu pole polio poll pollee polo pool apollo