Tonneau

From the tonneau of Bentley's car the sheriff and Garland removed the groceries and sick-room supplies, stowing them in the kyacks.

Source: wiktionary

The first step was to install a tonneau cover.

Source: wiktionary

He has spent ten years lovingly restoring a rather luxurious tonneau with teak panelling and leather seats.

Source: wiktionary

It was flood-tide along Fifth Avenue; motor, brougham, and victoria swept by on the glittering current; pretty women glanced out from limousine and tonneau; young men of his own type, silk-hatted, frock-coated, the crooks of their walking sticks tucked up under their left arms, passed on the Park side.

Source: wiktionary