Anonymous

Serpent is another name for any snake, Asp is a species specific type of venomous snake. I have heard the name serpent in referencing eels, so a little more ambiguous.

Anonymous

The terms snake and serpent may refer to any snake although serpent is usually used to refer to large ones. Asp refers to a venomous snake found in Europe.

Anonymous

Serpent/snake is the category, and asp falls into the category.