Roughcast and Undercoat

Roughcast noun - A coarse plaster for the surface of external walls.

Undercoat and roughcast are semantically related. In some cases you can use "Undercoat" instead a noun "Roughcast".

Undercoat noun - The first or preliminary coat of paint or size applied to a surface.

Roughcast and undercoat are semantically related. Sometimes you can use "Roughcast" instead a noun "Undercoat".