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.
prosily pursily porously prissily parsley pricily parasail parasol perusal presale presell parcel
rosily prosily dressily pursily brassily erosely furiously variously horsily crossly crusily curiously grassily greasily grossly morosely porously prissily seriously drowsily
pros porose praos proas prose proso pross prossie prosy prows pyros uprose