Yes, the word 'traffic jam' is a noun, a singular, common, compound, concrete noun; a word for the group of vehicles waiting behind something that is blocking the road; a word for a thing.
The Beijing traffic jam (60 mile traffic jam for 10 days)
Traffic jam
Traffic jam
The duration of Traffic Jam - film - is 2.02 hours.
A Traffic Jam
The Last Great Traffic Jam was created in 2005.
Traffic Jam - film - was created on 1979-01-12.
a traffic jam is called 'un bouchon (de circulation)' in French.
Congestion, gridlock, jam, traffic jam, traffic tie-up, logjam, traffic congestion, blockage.
A messy bedroom is like a traffic jam on a New York street.
The word jam means "to press tightly," or "to become wedged" It was first used in 1706. It is often associated with the word identifying the material which is jammed - a log jam for floating logs, an ice jam for ice in a river, a paper jam in a printing press or copying machine, and a traffic jam for vehicles on a road.