Do you know the difference between a Phizzwizzard and a Trogglehumper?
Can you tell your Snozzberries from your Snozzwangers?
Do you know what a Quogwinkle is?
If not, you might want to try looking up some of these words in a dictionary.
But chances are you won’t find them in any ordinary dictionary. You’ll need the "Oxford Roald Dahl Dictionary," which is being released later this year to celebrate the centenary of Dahl’s birth.