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.
hoarsen horizon hircine
hoarsen coarsen sarsen risen arisen arseno arson parson rerisen worsen
hoars hoarse hours horsy horsey horse horas hoers hearsay hearse hears harissa hares harass hairs haars ahorse