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.
horsily hoarsely hirsel hirsle
horsily pursily drowsily rosily brasil brassily hoarsely coarsely crusily greasily grassily grisly parsley prissily prosily doorsill dressily tersely
hoars hoarse hoers horas horse horsey horsy houris hours ahorse