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.
horsy horsey hoers hours horse horas hoars horahs hoarse houris heresy hearsay hoorahs hers hoorays hires haars heres hares heirs hairs heros hears heroes harass haeres hearse hirees harissa harries harrows heiress herries hurrahs hurrays hurries
horsy gorsy ors toros doors loris hours mores bores brosy gorse gores kors moors hearsay jersey kersey cors boors ores horsey zoris cooers dors torus yores shoers tors chores worse noris whores torsi fores prosy soras morse sorus pores ours drossy roars toras boras goers chorus pours pooris torrs sours hoers wooers doers torso fours dorsa horas hoars sores dorrs lores cores drowsy frowsy soars koras lours corse coirs oars noirs mors moras pursy rosy heresy shores boars giaours horse phoresy tores torse tours choirs yours
hoar hoary hoer hoorah hooray hora horah hour houri