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.
prows pros prose pross pyros prosy proas proso praos pareos porose parous porous purs pars prossie pyres pears prise pares parse preys puris presa peers prays peris pores pairs paras purrs purse pries piers prees prase praus press priss prese pursy perse peres parrs pours paris pursue peruse prissy paries praise pareus hypers pooris purees pariahs parries peeress peeries perries prez
arrows prows rows harrows borrows morrows trows brows frows furrows yarrows vrows burrows barrows narrows grows crows sorrows serows marrows farrows parous broos eros giros heros heroes brosy morose guiros ceros crews ferrous porose kaross pareos aurous vireos barrios brose porous burros dross shrews chiros cheerios tyros praos trios torous toros taros hydros drowsy cirrous saros pharos serosa prosy proso brews curios euros faros frowsy pross cirrose rose roes karoos browse karroos gyrose pros craws rosy froes rerose brios cerous braws cross gross pyros raws serous prose zeroes biros drowse zeros morros bros kouros arose proas vrouws trois erose duros draws hydrous tiros torose trews troys charros cheeros churros gyros