1. UN
The U.N. building is very impressive.
UN stands for United Nations.
What does UN stand for?
The U.N. monitored the country's elections.
The allies condemned the invasion as a violation of UN resolutions.
The U.N. has condemned the Somalia suicide bombing that took the lives of at least 33 people on Tuesday, including six members of Parliament
The UN endeavored to supply refugees with food.
2. united nations
United Nations is the biggest international organization in the world.