Ha ha ha, those are rules!
Sentences? How about this:
Hitting the tree put a dent in my car.
I found a stash of candy hidden under my brother's pillowcase.
Or if you need them both in one sentence:
I tried to get to the stash of food behind the metal door, but I could barely make a dent.
Is that what you needed?
To contract means to become smaller. Contraction = to become smaller.
Unrealistic=lifelike
Pessimistic=hopeful
Conventional=imaginative
Old fashioned=modern
Intolerant=welcoming
Open-minded=unreceptive