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.
horsey horsy horse hoarse hoers hours hoars horas horahs houris hearse heresy hoorahs hoorays hearsay hers heros heirs heres haars hares hears hairs hires haeres hirees harass heroes herries hurrays hurrahs harissa heroize heiress harrows harries hurries
horsey kersey jersey hearse surreys hydrase rerose ceruse purse pursy preys treys peruse prase murreys parse rise morose birse brosy ursae torose bursae burse erase bourse verse phoresy rase prose coarse course curse gorsy erose arse hoarse rosy horsy brose heresy cruse hearsay phrase frise rose carse pursue horse greys arise ruse arose gorse marse corse gyrase torse terse druse cirrose cerise rerise prosy gyrose prise prese porose perse nurse morse urase worse
hoar hoary hoer hoorah hooray hora horah hour houri