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.
pears pars peers paris paras pares parse piers parrs peres peris pairs perse hypers peruse pareus parous paries pareos perries pariahs peeress peeries parries pros purs prays puris press prees pyres pross priss prese prows purse pries pores pursy praos preys proas purrs proso presa pours prosy praus pyros pierce pooris porous prissy purees pursue prez
ears wears gears nears fears tears lears years sears rears bears hears pears dears shears ers ars jeers queers grease goers faros cooers fairs eros gars beers haars lairs heros pharos carrs vairs maars perse feuars paras boreas hairs areas cars hares ruers feres heres heirs peres charas keirs mares lares verse sers wares tares tars tiers urease souaris kiers charrs whereas cheeros choreas hers dares shiers doers tiaras seres airs xerus sieurs errs hearse varas saris saros paris arse greasy rares wooers ceres queuers creasy knars meres leers jars eras bureaus bares veers roars mars fares varus lars piers tarsi carse hoars pares maras ares quaeres peers wars gnarrs nares vars pairs naris lehrs crease biers boars fiars knaurs pars guars gaurs liars mairs coarse parse liers chairs bars gnars hoers cares hypers verso marse soars parrs viers laris ceros haeres hoarse peris wairs ureas wheres seers tahrs taros terse chares zeros weirs deers chars cheers shares suers sheers deairs shoers oars
pear per par parr sparry pere spare peery opera peerie aper peer perry parry pereia pareu pariah pareo pare parae para pair perea peri pier apery spar sparrow spear