His decision to quit his job made matters worse.

Making matters worse, he forgot to bring his wallet.

My friend's last name is Matterson.

Mirror matter is a hypothetical form of matter that is predicted to exist in the universe.

Scientists are studying the properties of shadow matter.

Upon the whole matter, I believe we should proceed with caution.

Subject-matter is an important aspect of any discussion.

As a matter of factly, I have never seen such a beautiful sunset before.

The antique shop had a beautiful display of matted glass ornaments.

I bought a new mattress pad to protect my mattress.