different between tunnage vs dunnage

English

From tun. Compare tonnage.

tunnage (countable and uncountable, plural tunnages)

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

dunnage (usually uncountable, plural dunnages)

(chiefly transport) Scrap material, often wood, used to fill spaces to prevent the shifting of more valuable items during transport, or underneath large or heavy items to raise them slightly above the ground, in order to protect from chafing and wet.
Personal effects; baggage.