luggage - baggage
In British English, both these words refer to the bags and suitcases that you take with you when you travel, together with their contents. Luggage is more common than baggage.
In American English, luggage refers to empty bags and suitcases. Baggage refers to bags and suitcases with their contents.
There has been a decline in sales of hand-sized luggage.
The passengers went through immigration control and collected their baggage.
Both these words are uncountable nouns. Don't talk about ‘luggages’ or ‘a baggage’.