The odourant used in the perfume gives it a pleasant scent.

The odourants in the room were overwhelming.

The room was filled with a strong odour.

The flowers emitted an odourous scent.

The odours from the kitchen were overpowering.

He walked odourously into the room.

The odourousness of the garbage was overwhelming.

Odourization is the process of adding an odorant to a gas to make it detectable by smell.

The flowers in the garden were odourful.

The room was filled with an odoured scent.