Bottleneck and Firth

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

Firth and bottleneck are semantically related In some cases you can use "Firth" instead a noun "Bottleneck".

Firth noun - A part of a body of water that extends beyond the general shoreline.

Bottleneck and firth are semantically related in waterway topic. Sometimes you can use "Bottleneck" instead a noun "Firth".