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.
polis polies poleis polios pols pilis polys poles pulis pools polos polls plies plisse poilus palais policy police pollees puls pals plus pelisse peles plews pawls palsy ploys pilus pills peals pleas pales plows pules peels palls pulse piles pails pulls plays palliasse pilose pileus pilous pilaus pilaws plaice please paellas palazzi pileous pillows pulleys paillasse
polis aiolis lis foals louis fouls palais bolas gullies looies leis follis kohls voles joles bolls nellies cullis moolas cols howls colas coals plies bolus holies folios colies cowls aaliis goalies bliss gillies lies violas hols muhlies cools molls bullies lollies alias gaols ghillies rolls polios molies dallies dolci soils tellies tolas pools relies dahlias sallies willies tallies tolls woollies diols challies chilies chillies cholas olios sheols shools wheelies molas pols kolos noils rallies dellies doylies jowls quolls oils tools solus wallies roils solos mealies ghouls poles dollies dols sullies fillies polls killies helios chillis delis lilies bialies fellies sillies realise valise roles coils wellies woolies dulias polys fowls viols fools belies coolies challis follies bowls pilis dolls cullies coles holes mools allies ballies flies boils bolos bialis mollies collies mols kolas jollies poleis coulis goals hollies quillais shoals bailies toils haoles foils ghoulies moils sols bellies dillies sylis knolls glias billies lolls caulis doilies boles jellies gallies tolus kellies polies toles owls polos chilis soles ceilis reoils pulis koels doolies wholes cholos souls noels moles oles nolos dailies doles tallis walies wools yowls
polio pol pili plie poilu pole poll pollee polo poly pool puli apollo spoil