Firth and Watercourse

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

Watercourse and firth are semantically related. in waterway topic. In some cases you can use "Watercourse" instead a noun "Firth".

Watercourse noun - An open man-made passageway for water.

Firth and watercourse are semantically related. Sometimes you can use "Firth" instead a noun "Watercourse".