449. Luggage
(X) Her luggages are at the station.
(O) Her luggage is at the station.
Note: Baggage, another word for luggage, can't be used in the plural either.
The baggage is ready for the tram.
450. Damage
(X) The fire caused many damages.
(O) The fire caused much damage.
Note: The plural form "damages" denotes money paid to make good a loss.
The insurance company paid the man damages.
451. Work
(X) Today I have many works to do.
(O) Today I have a lot of work to do.
Note: The plural form "works" means a factory or the writings of an author.
The works of Shakespeare are many. // I visited the steel works.