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.
hurrays hurrahs hurries hoorays hours horas horahs harass houris hoorahs herries harries harrows hearsay hers hoars hairs hoers horsy horse heirs heres heros haars hears hares hires haeres hearse heresy heroes hirees hoarse horsey harissa heiress
hurrays arrays rays terras drays surreys sirras sierras murreys arras bewrays brays forays frays hoorays hurrahs jarrahs grays kerrias morays murras prays sirrahs surras derays durras trays ras