The word "deal" is correct and usable in written English. You can use it as a noun, verb, and an adjective. Example sentence: I have a great deal on a new car.
No deal is better than a bad deal.
It's a big deal what happened and Jeremy, as any human being would, needs some time out".
We owe him a great deal and wish him every possible success.
The government will scrap the funding guarantees under Labor's 2011 national health reform deal.
"It is a good deal, a deal that meets our core objectives … If this framework leads to a final, comprehensive deal, it will make our country, our allies and our world safer".
"They don't want Iran to become a nuclear power and they will be as sceptical as the Israelis are as to whether this is going to be a real deal.
But there's no conflict, because everyone knows what the deal is.
I love the desktop app, it’s always running on my Mac. Ludwig is the best English buddy, it answers my 100 queries per day and stays cool.
Cristina Valenza
Retail Lead Linguist @ Apple Inc.