Uranium is a radioactive element.

He comes from an upper-class family.

The United States is a union of 50 states.

The letter U is the 21st letter of the English alphabet.

The letter 'u' is the 21st letter of the English alphabet.

The U-boat was a formidable weapon used by Germany during both World Wars.

I had to make a U-turn because I missed my exit.

The underwriter is responsible for assessing and managing risk in insurance policies.

The underwriter is responsible for assessing and managing risks in insurance policies.

She has a non-U accent.