Approval is a noun. Stating that something is good or allowed to do.

7 Synonyms for Approval

A verbal or written contract; legal promise

Question: Do we have an agreement on price?
Negative: We couldn’t reach an agreement on price.
Positive: We reached an agreement on price.

Given approval to do or go somewhere

Question: Do you have authorization to be in here?
Negative: I don’t have authorization to be in here.
Positive: I have authorization to be in here.

Someone close to you approves of your choice

Question: Did your dad give his blessing for your marriage?
Negative: My dad didn’t give his blessing for my marriage. 
Positive: My dad gave his blessing for my marriage.

Support a product or service; especially for money

Question: Does he have any endorsements?
Negative: He doesn’t have any endorsements.
Positive: He has an endorsement with Nike.

Approval to start something, like a project

Question: Do we have the go-ahead yet?
Negative: We don’t have the go-ahead.
Positive: We have the go-ahead.

Allowing someone to do something

Question: Did you get permission to eat cake?
Negative: We don’t have permission to eat cake.
Positive: We have permission to eat cake.

legal permission for an action

Question: Was there a UN sanction for the attack?
Negative: There wasn’t a UN sanction for the attack.
Positive: There was a UN sanction for the attack.