She looked at him possessively.

Her possessiveness over her belongings is extreme.

The students' books are on the table.

The possesser of the house is responsible for its maintenance.

She is possessioning her new car.

He possessioned the ball and scored a goal.

Her possessivity over her belongings is quite strong.

The antique vase is a possessable item.

The possessers of the house are responsible for its maintenance.

This is my car.