1. vital
Her vital signs are being closely monitored.
Regular exercise is absolutely vital.
On the other hand, there seem to be those among young folk who, while touching on Buddhism, have started to think of it as a vital spiritual support.
Water is a natural resource of vital importance.
Public opinion plays a vital in the political realm.
That red cloth is a "fukusa"; it is a vital tool used to cleanse the tea equipment.
It is better not to become ill in the first place and early diagnosis is vital.
What conditions are vital for developing film? Dark conditions are vital for developing film.
Some care staff say that they never practise restraint - that it is always wrong under any circumstances. Others say it can be vital, for the resident and themselves
It is vital that you inform me about your progress. It is vital to be honest with your spouse.
It’s vital for pilots and controllers to have good English.
Developing a sucessful strategy is a vital part of the planning process.
Although he's 70 years old, he's still a vital man.
Now that you mention it, I wasn't involved in the decision-making for the vital part.
2. important
It's not important.
Each time I see Mary, I learn something new and important from her.
If my wife calls, just tell her I'm in an important meeting and cannot be disturbed.
I wish I could care more about my grades but it seems that, at a certain point of my life, I decided they wouldn't be so important anymore.
You should write down whatever seems to be important.
Winning the competition is important. However, fair play is more important. You need to understand that winning is not the most important thing.
There were many things that I thought were important at that time that I no longer believe are important.
The important point to note is that both parties offered similar solutions to this problem.
Getting your message across is much more important than trying to say it exactly like a native speaker would say it.
In general, communication between doctors and their patients is the most important part of medical treatment.
The more countries a language is spoken in, the less important it is to sound like a native speaker, since speakers of that language are accustomed to hearing various dialects.
Franklin Roosevelt was born to a rich and important New York family.
That report was important because it pointed out all the errors the committee had made.
I discovered too late that I left out the most important part of my speech.
A few important facts emerged after the investigation.