Demonstrate is a verb in the English language.
e.g. I will demonstrate just why global warming is occurring
To make it a noun you need to add ION at the end of the word
e.g. John gave the students a demonstration of its powers
e.g .The teacher demonstrated the way to do the math.
You'll have to demonstrate the vacuum cleaner before I'll consider buying it.
We asked the salesman to demonstrate the new features to help us decide which model to buy.
I will demonstrate the use of gprof using the gnu make utility.
Wikiholism is contagious! Leprosy is not as contagious as laughter.
When the director asked the actor to demonstrate being a coquet, the actor behaved flirtatiously.
The dance instructor will demonstrate a new routine for her class. The chef will demonstrate how to roll out a pizza crust. If you want to get a drivers license, you need to demonstrate to me that you can parallel park without difficulty.
You will lord my shortcomings over me no more! May the Lord be with you.
Don't tempt me. Tempt me not. Go tempt someone else.
"He fishes for bass, while I prefer to fish for Northern Pike."
I am not writing a sentence using that word.
Nicole hoped that they would demonstrate how to use the microscopes, since she wasn't sure how.
I can give you a sentence using the word galaxy.