The decision to undergo surgery was a matter of life or death.

She never minces matters and always speaks her mind.

The interpretation of the contract is a matter of law.

Cancer is no laughing matter.

There are three states of matter: solid, liquid, and gas.

There are many baryonic matters in the universe.

The dry matters in the field need to be harvested.

There are various matters of law that need to be addressed in this case.

I bought two mattress toppers for my bed.

I bought new mattress pads for all the beds in the house.