Inventive vocabulary

Here's a new word for you: upgradation. Did you know you could make up words and put them on signs throughout the city?
Happens all the time.
The AnswerTips vocabulary feature on this page (which is awesome--double click on any word and check it out) doesn't recognize the word. It will give you no helpful information. Try the word 'inventive', though--it will even tell you how to pronounce it.
Nothin' for 'upgradation.
But: that doesn't stop the construction folk from digging a hole in the ground and putting up a sign about it so they can go away and leave it there unattended for a week.