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.
parous porous pareus pareos pros pars prose prosy pares paris praos pears parse pyros proas pairs pross paras proso parrs prows pours praus paries peruse porose parries prossie pariahs purs pries peers peres prees prase pyres prese priss pores puris press peris prise preys purrs purse piers pursy prays perse purees prissy pursue pooris hypers praise peeress peeries perries
aurous torous ferrous cerous cirrous parous porous serous hydrous grues kouros saros ruse brosy erose aureus burros curios brios furious arose arouse cross karroos morose lours eros cruse hours porose brose ceruse pareos pros crows prows praus gyrus varus carious rose vireos pours tours xerus zeros druse hydros taros serows fours toros trois troys truss urus cheerios yarrows chorus chiros morrows sorus prosy narrows pyros pharos biros serosa froes frows ceros giros rerose proso arrows gyrose rues praos faros nairus vrows crouse giaours barrows tiros harrows gross farrows cereus serious grouse karoos brows heroes marrows broos vrouws furrows burrows proas torose heros borrows curious rows roues gyros virus euros grows gurus ferreous pross bros prose various roes pareus kaross guiros kurus sorrows rouse cirrus crus peruse cirrose rosy ours barrios chirus morros churros sours zeroes dross duros rearouse carouse trios torus trows trues tyros charros cheeros yours
pro par sparrow spar pair para parae pare pareo pareu pariah parr parry pear prao proa prow pyro spare sparry