Bottleneck and Hold-up

Bottleneck noun - A crowded mass (as of cars) that impedes or blocks movement.

Hold-up and bottleneck are semantically related in block topic. In some cases you can use "Hold-up" instead a noun "Bottleneck", when it comes to topics like obstacle, traffic jam.

Bottleneck and hold-up are semantically related in traffic jam topic. You can use "Bottleneck" instead a noun phrase "Hold-up".