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.
pursily prosily prissily pricily parsley parasail porously parasol perusal presale presell parcel
horsily pursily drowsily rosily brasil brassily hoarsely coarsely crusily greasily grassily grisly parsley prissily prosily doorsill dressily tersely
purs pours puris purrs purse pursue pursy spurious spurs