Whether you are 8 or 88, we could all do with more vocabulary. Where would we be without the beauty of the words chatoyant (like a cat's eye), halcyon (happy and carefree) or insouciance (blithe nonchalance)? In fact, according to The Economist, by the time we are 8 most children know about 10,000 words, rising to anywhere between 25,000 and 35,000 words as an adult. Since the Oxford Dictionary has around 170,000 words in the dictionary that are in current use and around 47,0