Here are some examples:
Common Examples:
* News: We get the news from the radio.
* Politics: Politics can be a dirty business.
* Physics: Physics is a challenging subject.
* Mathematics: Mathematics is my favorite subject.
* Economics: Economics is a complex field.
* Ethics: Ethics are important in any profession.
* Measles: Measles is a contagious disease.
* Mumps: Mumps is a viral infection.
* Billiards: Billiards is a popular game.
* Athletics: Athletics is a great way to stay in shape.
Less Common Examples:
* Series: The series was very entertaining.
* Species: This species of bird is endangered.
* Means: This is the only means of escape.
* Headquarters: The headquarters is located in New York.
It's important to note:
* Some of these words can be used in a plural sense, but this is usually when referring to multiple instances of the singular concept. For example, "There are different branches of mathematics."
* The meaning of these words can sometimes be ambiguous, depending on the context. For example, "The news is bad today" refers to singular news, while "The news channels are reporting different stories" refers to multiple news channels.
Let me know if you'd like more examples or want to explore this concept further!