Rain is heavy and falls and beats the waves down. Also, rain lessens wind because of its vertical fall to the planet surface thus inhibiting the winds power if only marginally) to increase the height of swell and seas.
smooth
rubber
We went swimming in the sea. The sea was calm/smooth/choppy/rough when we crossed the Channel.
Smooth is to rough as calm is to turbulent.
Rough with the Smooth was created in 1995.
The difference between rough and smooth is the texture. Rough things have a bumpy, abrasive texture. Smooth things have are not rough.
steam with rough bark
rough
Steel can be both. It can be smooth or rough. It depends how it is made...
Its a bit of both but I think it's hard
Rough ER has ribosomes on it, smooth ER does not
Smooth surface