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.
prose porose pros prossie perse pross parse prows prosy pyros prase proso prise purse prese praos proas peruse pareos pursue parous praise porous pars prez purs pries press pears pours praus prize pyres piers priss peris parrs pores pares puris prays purrs pursy peers peres price preys paras pairs prees paris presa hypers pooris pierce paries pareus pricey prissy purees pariahs parries peeress peeries perries
rose rerose torose arose cirrose brose gyrose morose prose porose erose broos cross rouse rase barrows perse faros burrows curios ariose ceruse prise karroos furrows birse horse harrows coarse erase farrows gyrase course corse morse cruse browse frise pros duros proas pareos borrows vrows arse narrows guiros torse sorrows zeros drowse hydros triose serosa prows trows marse tyros ursae cirrous charros serous cheeros churros rearouse taros peruse biros kouros crouse frows prese brosy ferrous roes tiros praos giros morros hearse gross karoos ceros grows brows gyros gorse rise porous pyros croze pharos rerise hoarse proso pursue zeroes purse roose froze grouse phrase heros vireos arise parse horsey arouse jersey rows carse verse marrows carouse bourse arrows brios burse barrios pross nurse parous torous burros bursae prosy rosy euros kaross heroes curse hydrase eros aurous kersey crows ruse prase froes crosse cerise druse saros trois serosae serows dross trios morrows hydrous terse toros troys urase cerous worse bros cheerios chiros yarrows